Welcome to Advance Auto Parts second quarter 2013 conference call. All participants have been placed on a listen-only mode until the question and answer session. Also, today's conference is being recorded. Before we begin, Kevin Quinn, Vice President of Finance, will make a brief statement concerning forward-looking statements that will be made on this call.
Thank you for joining us on today's call. I would like to remind you that our comments today contain forward-looking statements we intend to be covered by, and we claim the protection under, the Safe Harbor Provisions for Forward-Looking Statements contained in the Private Securities Litigation Reform Act of 1995. Forward-looking statements address future events, developmental results, and typically use words such as believe, anticipate, expect, intend, will, plan, forecast, outlook, or estimate, and are subject to risk, uncertainties, and assumptions that may cause our results to differ materially, including competitive pressures, demand for the company's products, the economy in general, consumer debt levels, dependence on foreign suppliers, the weather, business interruptions, and other factors disclosed in the company's 10-K for the fiscal year ended December 29th, 2012, and other documents the company files from time to time with the Securities and Exchange Commission.
The company intends these forward-looking statements to speak only as of the time of this conference call. It does not undertake to update or revise them as more information becomes available. The reconciliation of non-GAAP financial measures mentioned on the call with the corresponding GAAP measures are described in our earnings release in our SEC filings, which can be found on our website at advanceautoparts.com. For planning purposes, our third quarter 2013 earnings release is scheduled for October 31st before the market opens, and our quarterly conference call is scheduled for the morning of Thursday, October 31st, 2013. To be notified of dates of future earnings reports, you can sign up through the investor relations website. Finally, a replay of this call will be made available on our website for one year. Let me turn the call over to Darren Jackson, our Chief Executive Officer. Darren.
Thanks, Kevin. Good morning, everyone. Welcome to our second quarter conference call. I'd like to start off by thanking our 54,000 team members for their hard work and dedication as we continue to strive to better serve our customers and grow our business. Joining me on the call today is our President, George Sherman, who will provide you with an update on our 2013 priorities, and Mike Norona, our Chief Financial Officer, who will update you on our financials. While we are pleased with our nearly 100-basis point gain in operating income rate achieved in the quarter, which resulted from improvement in our gross profit rate and more disciplined expense control, we are disappointed with our comparable store sales performance.
As we shared with you on the first quarter call, despite our positive start to the second quarter, our sales outlook remained guarded to ensure the sustainability of the early trends. Shortly after the call, our sales softened, and the weakness continued throughout the rest of the quarter, leading to a comparable store sales decline of 0.3%. Our comparable store sales decline was driven by our DIY business and partially offset by an increase in our commercial sales. While our sales were softer than expected in the quarter, we believe that the long-term fundamentals of the industry remain positive. Some of these factors include the increasing age of vehicles, which are now over 11 years, with 70% of those vehicles over seven years old, stabilizing gas prices, and an increasing number of miles driven.
As we discussed last quarter, we are still dealing with several unfavorable macro factors, including more consumers contemplating the purchase of new vehicles, which creates some short-term volatility as consumers are selective about how much more money to spend on aging vehicles. The economy also remains challenged by higher payroll taxes, high unemployment, and financial stress on our core customers. In an economy of necessity, consumers are only performing repairs that are absolutely necessary to keep their vehicles on the road. As a result, deferred maintenance remains at record levels. For example, our base oil business, which is core to our maintenance business, was down low single digits in Q2. We are encouraged by the turnaround in our brake and ride control business after a tough first quarter.
We saw significant impacts to seasonal categories of our business due to one of the wettest second quarters on record in the eastern half of the United States, versus record heat in the Southwest. These weather conditions helped drive double-digit increases in wiper sales and lifted the gross margin rates, but at the same time, had a significant negative sales impact on several seasonal categories like wash and wax, air conditioning, and radiators. Our comparable store sales shortfall was offset by improvements in our gross margin and disciplined expense control in the quarter. The team effectively managed our gross profit rate to 50.3%, which was 40 basis points greater than Q2 of last year, despite continuing headwinds from full operations of our new Remington distribution facility. Our diligent expense management resulted in an SG&A rate of 37.7% in the quarter.
The rate improved 58 basis points in the second quarter versus Q2 last year. We saw improvements across all areas of the business in the store support center Field infrastructure and labor productivity as measured by our sales per hour. We believe that some of the pullbacks cut into our top-line growth in select areas. That being said, it was consistent with our profitable sales growth and long-term 12% operating margin goals as a company. The focus on achieving profitable sales growth will result in quarters like this one. Striking the right balance is important, and I'm proud of how the team delivered on our bottom-line goals. We remain committed to our two core strategies of service leadership and superior availability. Collectively, the company's financial objective is to expand our operating margins to 12% over the next three years.
Our second quarter operating income rate improvement of 98 basis points is a solid step towards our goal. Mike will share more details in a moment. In 2013, we introduced our Company of One Focus on the Fundamentals as our core objective that will guide us for the foreseeable future. Similarly, the outcome to make the day for our customers, which drives our sales and profitability, is the measure of success. Broadly, when I step back and look at the direction of Advance over the last five years, we remain on track with our original mission focus of diversifying the position of the company to reflect the broader auto aftermarket. Structurally, the customers and the addressable $40 billion market for commercial is nearly double the size of DIY and growing at two times the rate of DIY.
Our commercial business is expected to be over $2.5 billion by the end of 2013 and will represent approximately 40% of our business, which is up from $1.5 billion five years ago. We remain committed to the original mission. Our growth has been driven by focusing on basic core capabilities to serve commercial customers, including improved availability, sales force development, Commercial Parts Pro deployment, delivery driver, and truck expansion, B2B, and other capabilities. The build-out of these basic core capabilities are complete with few exceptions. The key remaining capabilities are our daily replenishment supply chain and our commercially focused EPC, which are still in the very early stages of rollout. These capabilities position us to take our sales per Advance commercial program, which stands at $640,000, to much higher levels over time.
We intend to complete our daily replenishment centers and retrofits over the next five years and our EPC rollout in 2014. Capabilities, though important, only enable growth, whereas consistency of our sales, service, and operations are required to take the next step in accelerating our business. Growth and focus on the fundamentals has supplanted building capabilities as our key objective for the next five years. Predictably, growth includes our new commercially formatted stores, our BWP commercial acquisition, and commercial services, including MotoLogic, Driver's Side, and KeyLink. The customer channel growth that we prioritized for 2013 has been our commercial national accounts. I am very pleased that Monroe has expanded its business with us in the quarter, and Goodyear has awarded us with first-call status in key parts of the country. National accounts were a natural next step in our commercial growth, and they are growing at double digits in 2013.
Looking ahead, heavy duty, fleet, PBE, government, and banner programs are still ahead of us, which our key competitors include in their numbers today. Holistically diversifying our business while adding more growth options will enhance both our financial and business objectives. Focus on the fundamentals is about prioritizing consistency over building new capabilities. Consistency in our sales, service, and operational execution is always easier said than done. Our recent management changes to more tightly integrate the leadership, sales, and operations of our business are expressly focused on the cultural and operational priorities of the business. Specifically, the need to simplify our operations while consistently raising the level of service is what George will discuss in a few moments. Overall, the results for the second quarter are encouraging, including our 6.1% total sales gain, driven by our growth, including the acquired BWP stores and our new stores.
Our Autopart International sales grew 13% during the second quarter versus the second quarter last year, while improving our operating income by 21%. We continue to grow the number of stores served out of our new Remington distribution center and are seeing the expected sales lift. Fundamentally, both our gross margin rate and sales per labor hour performance reached near record levels in the quarter as well. The leaders that are focused on moving from building capabilities to driving sales and operational excellence began the transition into their new roles this quarter. In closing, I'd like to share an example of how growth and focus on the fundamentals bring service as our best part to life. Under the leadership of Regional Vice President Morgan Schafer, I'm proud to announce that tomorrow we are opening our 4,000th store, which will be located in Montgomery, N.Y.
This is a significant milestone in the company's history and further evidence of our commitment to long-term growth and continuing to serve our customers. I couldn't be prouder of Morgan and his team, District Leader Michelle Murphy and General Manager Melissa Mertay, as they prepare to open this new store. Morgan is a consistent leader with proven results, and I'm excited about the work he will continue to lead for us. This new store is also another example of continued expansion in the Northeast, which is a strategic growth area for us. Morgan, Michelle, and Melissa, thank you for your roles in this historic achievement in Advance's history. As you know, George Sherman joined us as President about 90 days ago, and I'm excited that he is taking ownership and ramping up on much of our operational work he will update you on today.
I'm encouraged by the progress we have made in our strategic initiatives, and I know under George's leadership, we will continue to see positive results in these areas. While we are not satisfied with our comp store sales, we feel that the progress we made on the gross margin and SG&A is a step in the right direction. I have confidence that George will lead us to accomplishing our previously stated goal of getting 12% operating income rate in the next three years while also driving increased sales. I will now turn the call over to George to update you on the work he is leading on our five key priorities that support our 2013 objectives. George?
Thanks, Darren, good morning, everyone. I, too, would like to thank our over 54,000 team members for their commitment to customer service while making strides in our 2013 priorities during the quarter. During my first 90 days, I've had the opportunity to visit stores in many markets, visit with commercial customers, also spend time with our support staff at our offices. I'm excited at the potential I see in our team members and customers. Realizing the potential of each and every team member and customer will be critical to our success in 2013 and beyond. I'll now provide you with an update on our five key priorities that support our 2013 objectives of growth and focus on the fundamentals. Growing our commercial business through improved levels of delivery speed and reliability, increased customer retention and share of wallet with national and regional customers.
Our delivery speeds continue to improve across the board. Commercial credit penetration continues to grow as a result of our in-source credit program. We're proud to be able to add Goodyear to our growing national accounts base. We're continuing to grow our national accounts. We also saw double-digit growth in our national and regional accounts during the second quarter, which is a critical component of our commercial growth strategy. Our B2B e-commerce business is up roughly 40% in the quarter. We continue to be pleased with the industry-leading e-services offerings we have for our commercial customers. As a result of these efforts, we saw positive comp store sales gains in our commercial sales. Including the acquired B.W.P. stores, our mix of business and commercial during the quarter grew to 40.3% versus 38.1% during the second quarter of 2012. Second, improving our local market availability.
Our work continues to increase the number of hubs that we operate through new store openings and the upgrade of existing stores that have the space and are strategically located to operate as hubs. Through our second quarter, we've expanded our hub store count to 354, which is an increase of 34 since the second quarter last year. We also continue to see progress with our operations at our Remington DC. As previously stated, we anticipate 400 stores will be serviced by Remington this year. Through our second quarter, we had 355 stores receiving shipments from Remington at least once per week, with more than half of those stores receiving daily replenishment. The results of the stores receiving daily delivery continues to be promising, as they've been achieving the expected sales lift since receiving daily deliveries versus their control stores within the region driven by parts categories.
We're still in the early stages. We'll continue to monitor results over the next several months before we can draw any definitive conclusions. Third, expanding our new store footprint. As you'll recall, we completed the acquisition of 124 B.W.P. stores at the beginning of the fiscal year. We're well into the formal integration of the B.W.P. stores into Advance stores. The sales and profitability of B.W.P. stores are currently exceeding our expectations. Most importantly, during the transition, we're remaining focused on employee retention and customer service. Our first two stores have been successfully converted. Our product lines are beginning to roll through the supply chain. We expect to convert approximately 40% of the stores by year-end. We remain on track for finishing the integration by mid-2014, consistent with the timeframe previously communicated.
During the quarter, we added 21 new Advance Auto Parts stores and five new Autopart International stores, keeping us on track for a more aggressive new store opening plan this year. The performance of our 2012 and 2013 classes of stores continued to exceed expectations, primarily driven by a faster ramp-up of commercial business than previous classes of new stores. Four, focus on fundamentals starts with consistently executing to exceed our customers' expected service levels. While we saw positive signs during the quarter with our increased dollars per transaction, units per transaction, and hourly sales productivity, along with our improved customer satisfaction levels, better parts availability, and lower return rates, we realize this is an area where we need to drive improvement. As part of this focus, we're continuing to improve the level of individual performance to maximize every customer engagement.
These efforts include improving our scheduling effectiveness and team member product training, which leads to increasing our customer order size by providing our customers with a full solution all the time in order for them to get the job right the first time. In addition, we're enhancing our commercial model to enable a higher rate of growth, including empowering our field teams to meet the demands of our commercial customers. This includes simplifying how we run our stores, including report and task reductions, process improvements, and placing a clear field-wide focus on business and customer outcomes. Fifth and finally, improving our profitability through increasing our efficiency and effectiveness throughout our support areas and our store operating model.
The work that our leaders have been doing locally and collectively to identify and deliver efficiencies in our business is a contributing factor to putting us on a trajectory to achieve accelerated profitability and reduce our SG&A per store gap versus our industry peers. For example, the insourcing of our commercial credit processing has significantly reduced the cost of processing those transactions. Additionally, we developed a long-term incentive program designed to accelerate both our profitability and growth. Collectively, our company priorities remain intensely focused on operations to drive results through customer service enabled through outstanding and consistent execution. Again, I've enjoyed my first three months with Advance and could not be more excited about the future growth opportunities for the company. I look forward to continuing to update you on these important priorities in the future.
Now I'd like to turn the call over to Mike Norona, our Chief Financial Officer.
Thanks, George, and good morning, everyone. I'd like to start by thanking all of our talented team members for their continued efforts to improve our business and serve our customers as we navigated through our second quarter. I plan to cover the following topics with you this morning. One, provide some financial highlights from our second quarter of 2013. Two, put our second quarter results into context with our expectations and key financial dimensions we use to measure our performance. And three, provide some insights on the remainder of 2013.
As we shared on our first quarter earnings call, we were encouraged with the strong start we had to our second quarter, and we were somewhat tempered with our sales expectations looking forward, as we were unclear of how much of our strong start was the result of a bounce back from the delayed spring versus a fundamental rebound in consumer demand. We are not satisfied with our second quarter comp sales performance, which softened in the final six weeks of the quarter after tracking up 2% in the first six weeks. We believe this softness was the result of record levels of precipitation in our core markets and the continued challenging macroeconomic environment on our consumer, such as increased payroll taxes.
While we are disappointed with negative comp sales, our operating profits grew 15.1% versus second quarter last year and exceeded expectations, driven by both an increase in gross profit rate and disciplined expense management, which led to a 98 basis point increase in our operating income rate, 12.6%, for the quarter as we work towards our longer-term operating margin goal of 12%. We remain focused on influencing the things that are in our direct control and positioning our company for longer-term growth and profitability by maintaining our strategic focus, executing on the fundamentals, and simplifying our operations. While we are pleased with our bottom-line results during the quarter, we realize in order to achieve our 12% goal, we must improve our sales performance while continuing the disciplined spending we've exhibited over the last two quarters.
As a result of the weaker consumer demand and record levels of precipitation throughout the majority of the eastern half of the U.S., our comp store sales decreased 0.3%. Our total sales, however, increased 6.1% to $1.5 billion, driven by the acquisition of B.W.P. and a net addition of 175 new stores over the past 12 months. Our comp store sales decrease was driven by declines in our DIY sales, partially offset by positive growth in commercial sales. Year-to-date, our total sales increased 4.3% to $3.6 billion, and our comp store sales declined 2%. Our gross profit rate in the second quarter was 50.3% versus 49.9% in the second quarter of 2012, or an increase of 40 basis points.
The increase was primarily due to higher merchandising margins driven by lower product acquisition costs and a favorable product mix, partially offset by planned increases in supply chain costs associated with the operation of our new Remington DC and the impact of B.W.P. sales, which have a lower gross margin rate due to their higher mix of commercial sales. Year-to-date, our gross profit rate increased 13 basis points to 50.1% from 50% over the same time period last year. Our SG&A rate of 37.7% decreased 58 basis points versus the second quarter of 2012, primarily driven by the timing of last year's company-wide leadership meeting, lower marketing expense, improved labor productivity, and a decrease in credit card fees as a result of the insourcing of our commercial credit program.
These were partially offset by higher incentive compensation due to individual store team member performance and operating income growth, fixed cost deleverage as a result of our negative comparable store sales, and increased new store openings. Year-to-date, our SG&A rate increased 46 basis points to 39% versus 38.5% over the same period last year. All in, our operating income was $194.7 million, which was an increase of 15.1% versus second quarter of 2012. This exceeded expectations and is a testament to our ability to drive our gross profit expansion and the team's disciplined focus on expense management despite softer comp store sales performance. Our operating income rate increased 98 basis points to 12.6% in the second quarter. The increased operating income rate came both from our Advance stores as well as our Autopart International business, which grew operating income over 20% during the quarter.
Our EPS increased 18.7% versus Q2 last year to $1.59 per share and includes $0.01 of transition costs associated with the integration of BWP. We still anticipate the transition of BWP will occur over an 18-month period from acquisition, and the associated costs with 2013 to be in the range of $0.15-$0.20. Through the first half of 2013, our operating income dollars increased 1.3% to $398.8 million, and our diluted EPS increased 2.9% to $3.23, including $0.03 of BWP integration costs. Year-to-date free cash flow is $27.9 million, which is down 89.5% over the same period last year, primarily as a result of the acquisition of BWP.
Excluding the net impact of the acquisition, our free cash flow would have been $198.3 million compared to $265.4 million over the same time period last year, primarily due to an unfavorable change in owned inventory, offset by less capital expenditures. Our owned inventory is approximately flat to Q2 2012, and our accounts payable to inventory ratio is 85.1% versus 82.9% in the second quarter of 2012. Our total inventory increased 14.8%, driven by our new Remington DC, more hubs, more new stores, and the acquisition of BWP. This increase was higher than our expectations due to a lower than anticipated sales performance. At the end of the second quarter, we had roughly $605 million of debt on our balance sheet, and our adjusted debt to EBITDAR was 2.2 times, which is below our previously stated ceiling of 2.5 times.
We continue to measure our performance of our business through the financial dimensions of growth, profit, and value creation. We continue to prioritize growth as our primary use of capital in order to increase returns and drive shareholder value. As a result, our focus continues to be on accelerating our commercial growth and stabilizing our DIY business. We plan to achieve this goal by improving our availability through our hub store openings, inventory upgrades, supply chain investments, and strengthening our market position with increased new store openings. We are proud of our improved coverage and in-market availability driven by the areas that George covered. We are also proud of the accelerated pace of our new store openings, including the net addition of 21 new stores in the second quarter.
This includes the opening of 21 new Advance Auto Parts stores and five new Autopart International stores, offset by the closing of three Advance stores, one Autopart International store, and the consolidation of one BWP store into an existing Advance store. At the end of Q2, our total store count was 3,990. Including the acquisition of BWP in Q1, we have increased our net store count by 298 over the last 12 months. We remain on pace to open 170 to 190 new Advance Auto Parts stores and Autopart International stores this year. We continue to prioritize our use of capital to drive shareholder value by first investing in the business, second, looking at strategic opportunities, and thirdly, returning money to shareholders through share repurchases. In every case, we have taken a disciplined approach to capital deployment, weighing the long-term value creation opportunities of each.
Over the past several quarters, we have built up our cash position as we wanted to maintain financial flexibility as we assess a range of organic and inorganic growth investments in our business. As our industry continues to consolidate, we believe there may be opportunities which will enable us to drive profitable growth and value creation, particularly in the commercial space. As we evaluate these opportunities, we are focused on driving attractive financial returns like we have achieved with our recent acquisition of BWP, which year-to-date has added $0.04 per share to our earnings. With this context, year-to-date, we have deployed over $250 million of capital in a manner consistent with our priorities. This includes investing approximately $180 million in our acquisition of BWP and returning approximately $75 million to shareholders via share repurchases, including $15.7 million in our second quarter.
At the end of the quarter, we had roughly $418 million left under our share repurchase authorization, and our average diluted share count was 73.3 million shares. As we have said before, we take a long-term view and look beyond individual quarters in making our capital allocation decisions as we balance investment opportunities against returning capital to shareholders. Ultimately, our focus is on maximizing long-term value to shareholders in a manner consistent with our capital allocation priorities. To that end, we do not intend to maintain our current levels of excess cash beyond the short to medium term. We are pleased that despite softer sales, we were able to exceed our profit expectations in the second quarter.
During the quarter, the 98 basis point increase in our operating margins was driven by some of the key drivers we have identified that will help us get to our long-term goal of 12% operating margins. They include gross profit margin improvements driven by our merchant and field teams in the areas of merchandising capabilities, global sourcing, and the execution and continued improvements in areas like shrink. We also made progress in our expense management, where our field teams delivered record labor productivity as measured by our sales per labor hour, and we continue to lower our administrative and support costs in areas such as professional fees and credit card fees. As a reminder, the pathway to our 12% goal requires sales growth, modest gross profit improvement, and a significant improvement in our cost efficiency and execution.
While we are disappointed with our comp store sales performance during the quarter, we believe our gross profit and SG&A progress is a solid step in the right direction. As a result of our commitment to build a more competitive cost structure while funding strategic investments and to employ a more disciplined approach to expense management, our total SG&A dollars per store decreased slightly to $654,000 per store in our second quarter versus $656,000 during the second quarter of 2012. With respect to value creation, we have maintained our disciplined approach to capital, which is reflected in our return on invested capital of 18.5%. For the quarter, our ROIC decreased 136 basis points versus the second quarter last year as a result of our increased invested capital due to the acquisition of BWP, the insourcing of our commercial credit, and the accelerated pace of our new store openings.
Longer term, we see opportunities to improve our ROIC as we begin to generate benefits from our Remington DC, our acquisition of BWP, and as our sales from our new store openings begin to ramp. We also see opportunities to reduce our net-owned inventory as we move towards our goal of achieving an AP ratio of 100%. Turning to the balance of the year. Given our year-to-date comp of minus 2%, we are now expecting comps will be slightly down for the full year. We continue to expect our gross profit rate will increase modestly. We'll continue to adjust our costs appropriately given our sales trends to deliver on our profit expectations. All in, we continue to be confident at this time in our ability to deliver the previously shared earnings per share annual outlook of $5.30 to $5.45.
In closing, we are committed to our strategies in commercial and availability and remain confident in the industry fundamentals and how we are positioned as a company. We are focused on improving our sales performance while continuing to improve our profitability and strengthening our returns to continue to drive shareholder value. We also want to thank our 54,000 team members who lead us every day with their relentless focus on service and commitment to operational excellence and execution, which are key ingredients to delivering on our goals. Operator, we are now ready for questions.
Thank you. At this time, to ask a question, please press star followed by one on your touch tone phone. You will be prompted to record your name. To withdraw your request, you may press star two. We also ask that you please limit yourself to one question and one follow-up question per request. The first question today is from Matthew Fassler with Goldman Sachs.
Thanks a lot and good morning to you.
Matt.
I've got, I guess one or two quick ones. First, I just want to make sure we understand the impact of the inventory accumulation on gross margins. Some of the companies we've dealt with, including I think you all a couple of years ago, from time to time, get some benefit from UNICAP when the inventory is up to a greater degree than sales. I guess having to do with the timing of capitalizing versus expensing distribution. Has this been and is it a factor for you as we think about gross margin here in Q2?
Hey, Matt, it's Mike Norona. No, it wasn't. If you're referring to LIFO was actually a little bit of a headwind, a little bit of an expense for us in the quarter, it was offset by some of the other things. Did we adjust prices and things like that? No, inventory and LIFO had no impact on our gross margin during the quarter.
Yeah, this is all true. A fair amount of the inventory bill, Mike, is you got to put into it, Matt, BWP in the quarter . Our new store count year-over-year is up 175 and Remington in the quarter. I think when you get down to the core Advance inventory growth, it's nominal, in terms of inventory growth in the quarter.
Yeah, Matt, the inventory growth in the quarter was 14.8% for the areas, primarily driven by the areas that Darren just talked about. We expect that to normalize throughout the year, and the growth at the end of the year will be more modest.
Okay. My second question relates to costs. Clearly, your operating margin is outperforming expectations as your sales to some degree underperform, I think your own expectations. Darren, you referred in your comments to perhaps some of your cost cuts having weighed on sales. I know you have a 12% margin bogey and that seems to be the driving force behind your strategic direction. Given that the top line is lagging a bit, are you considering perhaps reinvesting a bit more? Do you think incremental expense dollars would help the top-line story?
Yeah. Matt, that's a natural question. It's certainly a question for us, too. I would say this, is that what's important is staying consistent with our team. As we shared with you and many that we went into this year, that focus on consistency and profitable sales growth. As you go to achieve that goal, there will be cuts that you make in certain parts of the business, honestly, where you give up a sales dollar, but you save an expense dollar. The profitability in the company improves a bit for us. We know we have gaps relative to some of our competitors in the industry, and so we're trying to do that very thoughtfully. In my comments, there was as many expense dollar takeouts in what I would say the store support center, the regional field infrastructure.
As we think about the stores, our field organization, one of our focuses is across the organization, where do we have productivity opportunities? That really is location by location and in many ways, team member by team member. There's no doubt in my mind that as we make some of those adjustments, and you have to go through that process, we're going to give up some sales momentum in parts of the business. That being said, the other thing that we're growing through is that in the last 12 months, we've added nearly 300 stores. As we ramp up the new store growth, the core new stores continue to meet or exceed targets in terms of sales growth and profitability. I couldn't be more thrilled with BWP. As Mike talked about earlier, we're balancing bringing Remington up to speed.
There are many places where we continue to invest looking at the long-term growth profile, hence the 6% sales growth that we saw in the business. Growing Remington, our margin was up 40 basis points in the quarter, but that's a constrained margin given the cost that we had to overcome in Remington this quarter as well. As I said in my comments, we have to strike a balance. We'll have these quarters where we have the combination. Our seasonal categories, quite frankly, were very tough for us in the quarter. That constrained some of our comp store growth materially in places of the country. In other places, we achieved the total sales growth that we were looking for, too. It's not lost on me that we have to strike the right balance.
Thank you so much, guys.
Thank you. The next question is from Dan Wewer with Raymond James.
Thanks. Darren, it looks like the two-year stacked comp sales performance took a turn for the worse in the second quarter. Based on your guidance, it looks like that continues for the balance of the year. It appears that all of this deterioration is due to the weakness in your do-it-yourself channel. During your prepared comments and George's prepared comments, all of the discussion was focused on commercial. Surprised that there's not a greater level of urgency on resuscitating the do-it-yourself business, given it's still 60% of your total revenues.
Yeah. Dan, that's fair. You're right. We were pleased with the sales gains that we continue to see in our commercial business. Our DIY business was challenged again in the quarter. Organizationally, we've looked across the organization. We have the team focused on, in terms of the DIY business that we've talked about before across all of our organization, the growth really is growing the basket. We saw again in this quarter across the industry, units continue to be challenged in the industry. I would say one of the things that started to weaken our sales trends, because we actually started the quarter in a good place in our DIY business. Our seasonal categories in DIY, particularly air conditioning, wash and wax that tend to kick in this time of year. In the South, we saw the wiper business clearly pick up for us.
I continue to believe that that core DIY consumer, and again, the way they're recovering and our economy are uneven across the country, too. That pressure that's on that core customer in some of our core markets just continues to be higher. Organizationally, we're focused on what we can control, which is the customer in front of us and trying to make sure that we're serving them the best and filling that basket in front of them. George, would you add anything?
Yeah. I think there's a couple other initiatives on the DIY side of the business. One is around store simplification. I think when you look at our stores, we have a lot of metrics. We have a lot of messages we're sending the stores, and we're radically cutting back on that. Task management and getting our teams focused on power hours, the main portions of the business day when our customers tend to come into our DIY retail stores, is a key focus area for us, along with the DIY dollars per transaction that Darren mentioned as well.
Okay. Just as a follow-up, Mike, in the past, you had indicated that 12% operating margin goal would be contingent on comp sales growth of around 2%. Based on the reduction in the payroll hours, are you now thinking you can achieve that 12% EBIT goal with less than a 2% comp?
Maybe, Dan, what we've said is in order to get 12%, we really need three things. We need to have sales growth. I think the assumption we've made is around that 2% growth, and that kind of makes the assumption that the DIY on a total basis is flat and commercial is in that one to three, two to four range. We always expect to overperform the market. That's the assumption in how we get to 2%. Absolutely, it starts with we have to get the sales growing, and I think Darren and George both in their remarks just now shared that as a primary focus for us.
The second element is modest margin improvements. We've talked about, we've made good progress in the quarter, and we continue to see some upside in our margins. The other aspect is in terms of our costs, and you mentioned taking hours out. That's not how we actually think about our labor. We actually think about our labor as getting more productive. In the last number of years, we've invested a number of tools around performance management, and we're doing better performance management within our store, and we now have tools to measure individual productivity. I think we think about it more in improving the productivity, but we need to have all three. I think you asked the question around the outlook.
One of the reasons we're able to maintain our outlook is the progress we're making on the pathway to 12% and how we're doing with respect to our margins and our costs. I think the last time in our remarks that we said we were kind of guided to the lower end of the range, we think we're firmly in the range now, partially because of our beat during the second quarter and the continued improvements we see coming for the back half of the year.
Okay, thank you.
Yep, thanks Dan.
Thank you. The next question is from Michael Montani with ISI Group.
Yeah, hi guys. Good morning. Thanks for taking the question. One question I had was, if you think about the gross margin rate improvement that you had this quarter and then rolling out to increase the penetration of national accounts, how are you able to have the conviction that the gross margins could continue to expand in the back half of the year? Maybe if you can expand a bit on some of the initiatives there that you have underway, including Remington, and then just a follow-up after that.
Yeah, sure. Charles, why don't you talk about gross margin improvements going forward, and on that I'll hit the national accounts.
As we look through the quarter, we continue to see benefit from product acquisition costs, some of that pricing work that we've continued to drive through. While we plan for our margins in national accounts, and as the team has done a great job in expanding that business, we build that into our plans for Q3 and Q4. We've got good visibility to what we see the impact of mix is going to be, and we feel comfortable with the guidance that we put out there.
Yeah. Michael, I'd say on national accounts, to be honest, the way we look at it is gross margin dollar productivity. Those national accounts, as I said in my prepared remarks, what we're pleased about is we're growing our business with Monroe again this quarter. Goodyear has awarded us first call in parts of the country. Those businesses tend to be growing, those national accounts for us, they're growing at double-digit rates, and they tend to be a higher average ticket. If you think about the economics of commercial, when you have a higher average ticket and a higher average truck roll, that can be a very profitable transaction versus just chasing margin rate on some of the low end.
I think we've talked before, and I tried to highlight in my comments that being about it, this is a business that you stand in line and earn your way up first call status. As you earn your way up, the reward tends to be a higher basket. You end up, in some cases, as you serve those larger customers, you may give up some rate at the bottom end, but you certainly add more profit dollars to the overall organization.
A housekeeping question, which was really if you could quantify the sales dollars of BWP this quarter, then obviously with the great progress on national accounts, should we think about that as mid-single-digit percentage of the business? Is there a way to help sort of contextualize that, Darren?
I'll take the first part and I'll let Darren take the second part. Mike, we're not going to quantify. We've integrated BWP as we think about it as part of our growing our commercial business. I will hum a few bars. We're extremely pleased with that acquisition so far. The quality of people we have, the capabilities around commercial, we're learning a lot from that business. We're very pleased with what we've been able to do in the stores to retain our customers, and we think they're going to provide us with a lot of benefits looking forward at helping us build out our commercial capabilities. We think about that as embedded in our, we had a positive commercial growth in the quarter. They don't count towards our comp yet.
They're in our total sales growth of 6.1%. We're very pleased with how that acquisition has started off.
Michael, I would say this, is that if you look across all of national accounts, we're still well below a double-digit penetration as a company. We don't give out the specific target for competitive reasons, it has been a focus area for growth this year, and we continue quarter in and quarter out to make double-digit progress in terms of the growth of that business.
If I could just say one last question, which is I think key to the investment thesis, is really when you look at the comp guidance, it seems to imply that you all could go positive in the back half of the year, despite you mentioned sort of negative trends in the last six weeks. Is there anything specific that you could point to to sort of inflect the comp in the back half as the compares are easy but sort of similar? Is there initiatives that you have going on that you can point to specifically or just help us inform your view and thought process?
Yeah. Michael, a couple things. As we get to the back half of the year, a couple things happen. One, as we said in our prepared remarks, we certainly like the turnaround that we've seen in the friction business. We like the bounce back that we saw in the ride control business. The other thing that becomes important to us as we begin the fourth quarter, we begin to anniversary some of the new store growth that we focused on last year. We're going through a full year of ramping up new store growth, which tends to put pressure on the comp. When you're opening stores in new markets, that'll put a little pressure on the comp. You don't have the benefit yet of anniversarying those comps. We'll begin to anniversary those comps in fourth quarter of this year.
They tend to have been new store growth in cold weather markets that tend to hit their stride as you're going into the back half on the commercial side of the business. We all take a step down seasonally in the back half, but we have been positioning those maintenance categories, new store growth, and, as we talked about, seeing some signs of that deferred maintenance cycle, particularly in the brake business, start to show signs of life again, which tends to be better for us, particularly in those colder weather markets, which were tough a year ago.
Okay, great. Thanks. Good luck.
Thank you. The next question is from Scot Ciccarelli with RBC Capital Markets.
Hey, guys. I guess one of the questions I have is, you've been trying to make a lot of changes to the business over the last couple of years. Is there anything structurally or maybe even just philosophically that you've made to the business as you focus more and more on commercial and maybe it's had an adverse impact on the DIY segment?
I think more broadly, Scot, you asked about a philosophical change. I think it is certainly getting ourselves squarely wrapped around sales and service as the key outcomes in the store. I mentioned we've sent a lot of messages to stores, and sometimes that begins to cloud what's most important. We're eliminating tasks. We're eliminating reports. We're eliminating metrics. We are changing our focus and getting our teams squarely focused on sales and service every day, outcomes, not inputs. That is work that we've been working on with the field team over the last couple of weeks. That messaging is being cascaded across our stores. Our teams want to hear it. It unleashes them on sales.
I do think that there's going to be an orientation change as to how we run our business, which is a more of a field-centric-led organization, having great dialogue market by market on what we need to do to drive our business, but really getting our team focused around selling.
In previous conversations with the management team, I know you haven't been privy to all these, but my sense was that there's certain structural parts of the business that are just fundamentally different from commercial versus retail. I guess my question is, have any of the changes that you've made as you try and really refocus the company on being a commercial provider, had an adverse impact in any way, shape, form on the DIY segment?
Yeah. Well, if you get all the way down to store level, Scot, you think about a general manager five years ago, what we asked that general manager to do is virtually exclusively focus on the DIY side of the business. Today, as that general manager puts together their schedule, are they having more intense focus on making sure we have the delivery drivers in place, engaging with that CPP in a different way. You can see it, as we've talked before, that you got to earn your way up in relationships. When you're asking a general manager to go do visits to commercial customers, five years ago, six years ago, we wouldn't have had that level of intensity.
I tend to think about, and part of the reason the changes that we made, as you listen to George, is that how do we now bring that consistency across all the stores and continue that cultural journey. The commercial business, unlike retail business, doesn't turn on and off based just on marketing and based on just season. It works based on relationships. We're asking that general manager and the sales teams to work together in a different way to continue to build the relationships with those key customers over time. Whenever you ask somebody to do something, and to actually focus on something a little different than it was before, you do pay a little bit of a price in other parts of the business. Given the size of the commercial market and its growth profile, I'll go back to what we said.
Our original mission is to see this business to reflect the overall market as well.
Thank you. Our final question today is from David Gober with Morgan Stanley.
Good morning. Thanks for taking my question. Just wanted to focus a little bit on the productivity gains that you saw in the stores. Could you give us a little bit more color on what really led to that? Was it just the changing in labor hours in the store? Anything more specific that you could give in terms of color there?
Maybe I'll start, George, maybe talk about specific measures. I think I mentioned it earlier, over the last couple of years, we've put some tools in that now allow us to measure individual productivity and then performance manage. The whole idea of this is improving sales. It allows us to set goals by individual team member, and then it allows us to measure productivity, and it's been one of the opportunities in our company, and it's been a key focus for us. What we saw during the quarter is record labor productivity as measured by our sales per labor hour. That's how we measure productivity in terms of sales per labor hour. I think we said in our remarks, that we saw record labor productivity, which we're pleased at.
One of the things that we've spoken about in our pathway to 12% in our costs, one of the big areas that we've said there that has to improve is our labor productivity. We're actually pleased with the actual measurement and the performance of our field teams. Maybe George, you can talk about some of the things we're doing to improve that.
Yeah, Mike, I think we look at labor productivity that we experienced during the quarter, in general terms, we're happy with that. On balance, we feel that we've taken expense out of the right places. With that said, anytime you try to trim out some expense, you always run the possibility of hitting some muscle, and we're clearly open-minded that we may have done that in some cases. That's going to be something that we look at. To Mike's point, we've seen increased productivity. That is a key metric for us. That is something that we have to do, is to get better sales productivity in our stores, and we're seeing that.
Yeah. David, you would expect us to also balance that in terms of what the customer satisfaction levels are. We get those by store. IMR does research on the commercial side. In the second quarter, we saw those metrics improve. There's a delicate balance between cost and service levels. It really goes back to the team because they have to balance those. In the quarter, we were very pleased with our IMR scores. We're pleased with our NPD scores and our internal scores in the quarter.
Thank you. I will now just turn the call back over to Kevin Quinn for any final comments.
Thank you, operator, and thanks to our audience for participating in our second quarter earnings conference call. If you have additional questions, please call me at 540-561-6454. Reporters, please call Shelley Whitaker at 540-561-8452. That concludes our call.
Thank you. That concludes our call today. You may now disconnect. Thank you for joining us.