Welcome to the O'Reilly Automotive, Inc. second quarter 2018 earnings conference call. My name is John, and I'll be your operator for today's call. At this time, all participants are in listen only mode. Later, we will conduct a 30-minute question and answer session. During the question and answer session, if you do have a question, please press star then one on your touchtone phone. Please note that this conference is being recorded. I'll now turn the call over to Mr. Tom McFall. Mr. McFall, you may begin.
Thank you, John. Good morning, everyone, and thank you for joining us. During today's conference call, we'll discuss our second quarter 2018 results and our outlook for the third quarter and full year of 2018. After our prepared comments, we'll host a question and answer period. Before we begin this morning, I'd like to remind everyone 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. You can identify these statements by forward-looking words such as estimate, may, could, will, believe, expect, would, consider, should, anticipate, project, plan, intend, or similar words.
The company's actual results could differ materially from any forward-looking statements due to several important factors described in the company's latest annual report on Form 10-K for the year ended December 31st, 2017, and other recent SEC filings. The company assumes no obligation to update any forward-looking statements made during this call. At this time, I'd like to introduce Greg Johnson.
Thanks, Tom. Good morning, everyone, and welcome to the O'Reilly Auto Parts second quarter conference call. Participating on the call with me this morning are Jeff Shaw, our Chief Operating Officer and Co-President, and Tom McFall, our Chief Financial Officer. David O'Reilly, our Executive Chairman, and Greg Henslee, our Executive Vice Chairman, are also present. It's my pleasure to begin the call today by congratulating Team O'Reilly on a strong second quarter and a solid first half of 2018. Our team's proven ability to provide superior service at a great value drove our second quarter comparable store sales increase of 4.6%, which exceeded the top end of our guidance range. As we discussed on our first quarter call, the second quarter got off to a difficult start as many of our markets experienced continued winter-like weather.
For the balance of the quarter, we benefited from more normal weather patterns as spring arrived and demand picked up at the end of April. Our team of over 79,000 dedicated team members stepped up to the challenge by providing outstanding customer service and driving our strong sales results in the quarter. Our team remains committed to driving profitable sales growth with an unrelenting focus on taking care of our customers, and we are pleased to have driven an increase in the second quarter operating profit of 6.8% as compared to the second quarter of 2017, excluding last year's SG&A benefit from a legal reserve adjustment, which Jeff will touch on in a moment.
Our sales and operating profit performance, coupled with the continued benefit to net income from tax reform, drove an increase in earnings per share of 38% to $4.28 per share, which also exceeded the top end of our guidance range of $4.05, and is a testament to the unwavering commitment of Team O'Reilly to controlling expenses and providing the best customer service in the automotive aftermarket. I'd like to provide some additional color on our second quarter comparable store sales results. We experienced weather-driven headwinds at the beginning of April as the unseasonably cold and wet winter in many of our markets pressured ticket counts, specifically on the DIY side of our business. With the onset of spring beginning at the end of April, our comp trends improved, and although April was the softest month of the quarter, it did contribute to our quarterly same store sales growth.
Our teams did an excellent job capitalizing on the pent-up demand and delivered our best performance of the quarter in May. We moved to the typical summer selling season in June, the hot weather in many of our markets was a contributor to the steady demand, and we have continued on a steady solid trend thus far in July, which is in line with what we would typically expect to see from a normal weather backdrop. Similar to our first quarter, both our professional and DIY sides of the business were positive contributors to our comparable store sales growth, with professional performing better as we saw strong ticket count growth on that side of our business again in the second quarter. As I mentioned earlier, our DIY ticket counts were pressured at the beginning of the quarter but stabilized with the arrival of spring weather.
On a combined basis, our ticket count comps finished flat for the quarter. Average ticket continues to be a strong contributor to our comparable store sales increase, driven by the increasing complexity of vehicle repairs, a favorable overall business mix, and continued effective pricing management. Similar to the past two quarters, we benefited from some modest commodity-driven inflation on same-sku pricing during the quarter. On a category basis, we saw solid performance broadly across hard part categories with strength in categories such as ride control and brakes, in line with our expectations of typical maintenance and failure-related demand after a normal winter. You would expect, we also saw good performance in typical spring maintenance categories as we moved through the quarter, as well as strong performance on hot weather categories, particularly HVAC and refrigerants in the back half of the quarter.
However, these heat-related categories present a mixed headwind to gross margin, which I will discuss in a moment. We view the impact of weather we've experienced thus far in 2018 as in line with normal weather cycle for our business, and our expectations for the remainder of the year include an assumption of continued typical weather. Ultimately, swings in the weather balance out over the long term, and the strength of the Automotive Aftermarket is determined by the core underlying drivers of demand in our business of miles driven, the number and average age of vehicles, and health of the consumer. As we have indicated, outlining our comparable store sales guidance on the last two calls, we have a favorable outlook for these drivers in 2018, as employment and the economic outlook for consumers remain stable and the average vehicle age continues to increase.
However, we expect to face some short-term pressures to miles driven as consumers adjust to higher gas prices or otherwise respond to economic uncertainty, including any temporary disruptions to the economy from rising prices or the impact of tariffs. In addition, our guidance incorporates the headwind we'll face from an additional Sunday in the third quarter of 2018 as compared to 2017. Sunday is our lowest volume day of the week, and the impact of additional Sunday has historically been approximately 50 basis points headwind to the quarter comparable store sales. As a result of these factors, we're establishing our third-quarter guidance at 2%-4%. Based on our year-to-date results, our third-quarter guidance, and the difficult comparisons we face in the fourth quarter, we are maintaining our full-year comparable stores guidance to 2%-4%.
For the quarter, our gross margin of 52.5% was an eight-basis-point improvement over the second quarter of 2017 margin, which was within our expectation built into our full-year gross margin guidance. As I discussed earlier, in the second quarter, we faced some gross margin headwinds from strong sales of hot weather categories such as HVAC and refrigerants, which were significant contributors to our comparable store sales and gross profit dollar growth, but on average, carry a lower gross margin percentage. This mix headwind, as well as continued headwinds from increased transportation costs, were offset by a lower LIFO impact, which Tom will discuss in more detail. We are leaving our full-year gross margin guidance unchanged at 52.5%-53%. However, we expect to continue some pressure from the mix dynamic moving forward, and we now expect to come in at the bottom half of that range.
We continue to see rational pricing within our industry. We are closely monitoring the impacts of tariffs as well as other sources of potential inflation and remain confident in our industry's ability to pass through inflationary price increases. We also continue to expect our full-year operating profit for 2018 to be within our previously guided range of 18.5%-19% of sales. For earnings per share, we're establishing our third-quarter guidance at $4.20-$4.30, which at the midpoint would represent a 32% increase over EPS of $3.22 in the third quarter last year. We are also updating our full-year EPS guidance to $15.70-$15.80, an increase of $0.40 at the midpoint, reflecting our second quarter comparable sales and gross profit performance of the shares we have purchased through the call today.
I would remind everyone that our full-year guidance includes the impacts of shares repurchased through this call, but does not include any additional share repurchases. Before I turn the call over to Jeff, I would like to again thank the Team O’Reilly for their solid performance in the first half of 2018 and continued dedication to consistently providing exceptional service to our customers every day. We remain very confident in the long-term drivers for demand in our industry, we believe we are very well-positioned to capitalize on this demand and increase our market share. I'll now turn the call over to Jeff Shaw. Jeff?
Thanks, Greg, good morning, everyone. I'd like to begin today by congratulating Team O’Reilly on a solid second quarter and thank our team for their continued commitment to providing top-notch customer service. As Greg previously discussed, we saw a pickup in our business as we moved through the quarter, we're very pleased with the hard work and dedication of our team, which resulted in the 4.6% comp store performance in the second quarter. I'd like to spend a few minutes discussing our SG&A results for the quarter. SG&A as a percent of sales was 33%, a deleverage of 54 basis points from 2017. As we discussed last year at this time, our second quarter of 2017 included a non-recurring benefit of $9 million for reduction to a legacy legal reserve.
Excluding this one-time benefit from the prior year results, our SG&A delevered 15 basis points, which was better than we anticipated as our team drove strong sales while maintaining strong expense discipline. On an average per store basis, also excluding the legal reserve benefit in 2017, our SG&A grew 3.2%, which was in line with our expectations. We outlined in our initial 2018 guidance, we're significant beneficiaries of tax reform and feel it's appropriate to allocate some of these savings back into the business to continue to improve the levels of service we offer our customers. The cost of these investments is the key driver of our higher-than-normal year-over-year SG&A per store growth.
These investments are heavily weighted to enhancing store-level payroll and team member benefit plans, we remain very confident that our commitment to taking care of the customer by ensuring that we're hiring, training, and retaining the very best professional parts people in the industry will drive our continued strong performance. We continue to expect to follow our previously disclosed plan regarding these incremental investments, we're reiterating our guidance for full year growth in SG&A per store of 3%-3.5%. I'd like to spend some time talking about our store expansion for the first six months of 2018 and our plans for the remainder of the year. We successfully opened 128 net new stores in the first six months and are on target to hit our goal of 200 net new stores in 2018.
We continue to be pleased with the performance of our new stores and continue to be successful in identifying great locations across the country with our store growth in the first six months of 2018 spread across 29 different states. Our store growth continues to be balanced between our expansion markets, with the heaviest concentrations in Florida, Ohio, the Mid-Atlantic and the Northeast, and backfill in existing, more mature markets, including Texas and the Western U.S. Our ability to effectively enter new markets while also selectively expanding our presence in existing markets continues to give us a great advantage in selecting new sites and, more importantly, identifying, hiring, and training outstanding store teams to provide excellent customer service in our new stores. Our success in new store expansion wouldn't be possible without the continued outstanding support provided by our distribution teams.
A key to a successful entry in a new market or the ability to remain the dominant supplier in existing markets is to equip very solid store teams with industry-leading parts availability. The teams in our 27 DCs located across the country set the industry standard with five-night-a-week service to our stores, along with multiple deliveries throughout the day to our local stores and our hub stores, ensuring that we can be the first supplier to provide access to those hard-to-find parts. I'd like to congratulate our DC teams on a strong second quarter and thank them for their continued outstanding customer service. We'll have the opportunity to highlight the great work of one of our distribution teams when we host our upcoming Analyst Day in August at our Greensboro, North Carolina, facility.
This DC was opened in 2009 and was recently expanded from 300,000 to 500,000 square feet in 2017 to support our continued growth in the Southeast and Mid-Atlantic. As I close my comments, I want to thank all of Team O’Reilly for their continued dedication to our company's success. We've had a solid year so far, and we're in a great position to finish the year strong. Our current and future success is dependent upon providing the best customer service in our industry, and we won't rest on our past success, but instead remain committed to out-hustling and out-servicing the competition, earning our customers' business each and every day. Now I'll turn the call over to Tom.
Thanks, Jeff. I'd also like to thank all of Team O’Reilly for their hard work and dedication, which drove good second quarter results and a solid first half of the year. Now we'll take a closer look at our quarterly results and update our guidance for the full year. For the quarter, sales increased to $165 million, comprised of $103 million increase in comp store sales, a $59 million increase in non-comp store sales, a $4 million increase in non-comp non-store sales, and a $1 million decrease from closed stores. For 2018, we continue to expect our total revenues to be $9.4 billion-$9.6 billion. As Greg mentioned earlier, our gross margin was up eight basis points for the quarter as we faced a headwind from mix but benefited from LIFO.
During the quarter, we continued to benefit from reducing acquisition costs in many areas. These benefits were offset by increases related to commodity prices. As a result, we did not see a LIFO charge during the quarter versus a $10 million charge last year. For the remainder of the year, we now do not expect to have a LIFO charge. This will be highly dependent on potential inflation on commodity pricing and tariffs. The Tax Cuts and Jobs Act of 2017 had a dramatic impact on our second quarter earnings and will continue to have a significant positive impact on our tax rate on a go-forward basis. Our effective tax rate for the second quarter was 21.5% of pre-tax income, including the benefit from tax deductions for share-based compensation, which reduced our tax rate by 3%.
Excluding the tax benefit from share-based compensation, our effective tax rate of 24.5% was in line with our expectations. Year to date, our tax rate was 22.2% of pre-tax income, and we now expect our full year tax rate to be 22%-23% of pre-tax income. Please keep in mind, changes in the tax benefit from share-based compensation will create fluctuations in our tax rate. We'll move on to free cash flow and the components that drove our year-to-date results and our guidance expectations for full year of 2018. Free cash flow through the second quarter was $632 million, which is $181 million increase from the prior year, driven by higher pre-tax income, lower cash taxes, and a reduction in our net inventory investment. For the full year, we're maintaining our free cash flow guidance in the range of $1.1 billion-$1.2 billion.
Inventory per store at the end of the quarter was 601,000, which was up slightly from the beginning of the year and from this time last year. We continue to expect to grow per store inventory in the range of 1%-2% this year, as our ongoing goal is to ensure we grow per store inventory at a lower rate than the comparable store sales growth we generate. Our AP to inventory ratio at the end of the second quarter was 107%, which we anticipate we'll be able to maintain through the end of the year. Capital expenditures for the first half of the year were $224 million, which was down slightly from the same period of 2017 and in line with our expectations. We continue to forecast CapEx to come in between $490 million and $520 million for the year. Moving on to debt.
We finished the second quarter with an adjusted debt to EBITDA ratio of 2.2x as compared to our ratio of 2.12x at the end of 2017. The increase in our leverage reflects our May bond issuance and borrowings on our unsecured revolving credit facility. We are below our newly stated leverage target of 2.5x. We will approach that number when appropriate. We continue to execute our share repurchase program. Year to date, we've repurchased 4.2 million shares at an average price per share of $259.42 for a total investment of $1.1 billion. We remain very confident that the average repurchase price is supported by expected discounted future cash flows of our business. We continue to view our buyback program as an effective means for returning available cash to our shareholders.
Before I open up our call for your questions, I'd like to thank the O'Reilly team for their dedication to the company and our customers. This concludes our prepared comments. At this time, I'd like to ask John, the operator, to return to the line. We'll be happy to answer your questions.
Thank you. We will now begin the question and answer session. If you do have a question, press star 1 on your touch tone phone. If you wish to be removed from the queue, please press the pound sign or the hash key. If you're using a speakerphone, you may need to pick up the handset first before pressing the numbers. Please limit your questions to one question and one follow-up question. Once again, if you have a question, press star 1 on your touch tone phone. Our first question is from Christopher Horvers from J.P. Morgan.
Thanks. Good morning, guys. Can you talk about the weather a little bit more? Understanding that April was weak on the DIY front in the upper Midwest and Northeast did have a very strong hot trend during the quarter. As you look ahead, it would seem like your heavily weighted markets like Texas and the West Coast have really seen a spike in the heat, and I think that's expected to continue, particularly on the West Coast. As you think about that, does that provide sort of this extended hot season, where you could continue to see the performance in the hot weather categories and just driving of the overall comp?
Sure, Chris. This is Greg. What I'll tell you is, in the colder weather markets earlier in the quarter, we benefited from some of the failure breakage type parts. When you're looking at chassis, under-car steering type components, strong sales in those categories. Then in the hot weather markets, and a lot of those cold weather markets, to your point, that were going to be hot. We had strong sales in rotating electrical, HVAC, refrigerants, things like that. We certainly hope that the hot weather continues and in our southern markets and markets where we've seen hot weather, we've seen favorable sales results, and we would expect that to continue if we continue the weather trend we have.
Hey, Greg, I might add that the West Coast was hot last year, we're up against some tougher comparables out there.
As you think about this, sort of speculative question, if you didn't have the 50 basis point headwind from the extra Sunday here in the third quarter, would you have considered guiding perhaps three to five in this quarter versus the two to four?
Chris, this is Tom. The 50 basis points is just math and calendar based. As Greg talked about in his comments and we put in our press release too, we're also seeing some rising gas prices, which historically has tended to dampen miles growth and also impacts especially our low-end consumer and their ability to afford items. I think it's the combination of those items that led us to continue to give two to four guidance when we had a strong second quarter.
Is it fair to say that the mile-driven impact hasn't necessarily shown up in terms of trend?
That would be fair to say.
Okay. Thanks very much.
Obviously, we don't have the latest miles-driven data, but we haven't seen that in our business yet, but we're in a short period of the quarter.
Thanks very much, guys.
Our next question is from Daniel Weber from Raymond James.
Thanks. Greg, I wanted to ask you about pricing strategies for our ship-to-home revenues as part of your online program. We look at these each week. This week you're not offering any promotions. A couple of weeks ago, you were offering different types of promotions, 15%-20% depending on the ticket size. What are your thoughts about using this discounted strategy for ship-to-home, if there's any risk that it maybe jeopardizes the integrity of in-store pricing. How do you think you'll go forward with promotions on ship-to-home sales channel?
Sure, Dan. It's a great question. Glad you picked up on that. One of our competitors changed their strategy. They announced a strategy change last quarter, I believe. We just anniversaried the rollout of our new website a couple of weeks ago, and we had some significant increases through our online channel during the first year. Having anniversaried that, we're looking at different options, and we're testing a few things. To your point, we're testing different types of promotions online, and we're testing periods where we're not running promotions online. We're in the process. We just started that a few weeks ago. We're in the process of really measuring the sales impact of the varied promotions as well as the on-off promotion cycle.
What I would tell you about the price transparency to in-store pricing is, on a run rate, about 60-plus% of our transactions are buy online, pickup in store. Even though we're running historically promotions online to provide the consumer a discounted price online, those consumers are still ending that transaction in our store. We feel confident that one of the big reasons for that is, one, the immediacy of need, two, the need for interacting with our professional parts people on the counter to get help with the installation to make sure they have all the parts they need to complete the job the first time.
Okay. This is a follow-up question on the tariffs. We went through the 200 pages of items on this proposed list, and I was surprised how many auto parts were included. Can you talk about the elasticity or the inelasticity of demand you would expect if you were to attempt to pass those prices through to the consumer?
Yeah. First of all, Dan, I'll give you a little history as to where we are in that process. When the tariffs were first announced, we immediately reached out to our supplier base and started trying to understand which categories would be impacted. Broadly, when you look at that 60-plus page document, there's a lot of categories that at face value you would expect to be included in the tariff rate. To date, we've only had a couple of suppliers that have imposed any type of tariff on us and a couple of more that are coming during early fourth quarter. None of those tariffs to date have been a full 25%. They've been fractional based on it either being a component of the product that was subject to tariffs or other varied reasons based on their overhead manufacturing cost.
So far we haven't seen a big impact. What I would tell you is historically, our industry's done a really nice job of passing that along. Thus far in the year, both from an inflation and a tariff standpoint, we have been able to pass that along.
Okay, great. Thank you. Yes, goodluck.
To add to that, where we see pricing being more elastic are on commodity items and performance and dress-up items that aren't necessary to run your vehicle or you can extend that maintenance cycle. Oil obviously has gone up and down a lot over the years. As the price goes up, we see people extend how often they'll do oil changes. Most of the parts are required to operate the vehicle safely.
Okay, great. Thank you.
Our next question is from Ben Bienvenu from Stephens Inc.
Hi, good morning. Thanks for taking my questions.
Good morning.
I wanted to ask, you made some commentary around seasonal maintenance repairs, but I wanted to get a sense as to whether or not you're seeing any evidence of car park related maintenance repairs that might give you a sense that the background trends in the secular environment are improving as it relates to the car park.
Yeah. When we look at our progress through the quarter, there's a lot of things that are contributing to our increased sales this quarter. We talked about some of those things, one of them would be the car park. Each of our inventories in each of our stores is really customized to that store based on specific VIO. Some of the repairs, it's hard to differentiate if it's a result of winter weather, for example, or breakage, or just the cycle of doing those routine repairs. I would say that there are categories that we have seen some improvement. I think brakes would be one of those. I think battery replacement would be another.
In aggregate, last year was a softer-than-expected professional business as those vehicles from the late SAR years continued to enter the beginning of really our sweet spot. The younger the vehicle, the more apt it is to be repaired by a professional. The strength year-to-date in the professional business makes us feel good that we've seen the worst of the SAR years come into our market, and as opposed to being a headwind, should be flat. Over time, return to a tailwind.
Understood. That's helpful. I wanted to ask a question about the traffic versus ticket mix of your business. You've delivered strong comps year to date, primarily ticket driven. That's not inconsistent with the past. I'm curious about what environment you would need to have to see traffic perk up in your business over a given period of time.
When we look at our traffic versus average ticket this year, the strength of our average ticket is really driven by strong performance in our under car categories and more extensive repairs, especially on the professional side of the business, which carries a higher average ticket. In aggregate, from a ticket standpoint, to see stronger positive results, we would need to see stronger DIY counts because of the lower average ticket, but higher traffic volume, which has a bigger impact on our overall business, as we saw in 2014, 2015, and 2016.
Great. Thanks. Best of luck.
Our next question is from Simeon Gutman from Morgan Stanley.
Good morning, guys. Nice quarter. I wanted to ask first on DIY, which looked pretty strong. I wanted to just ask generally why. Tom, you mentioned that you're not seeing any impact yet from gas prices. Is the strength more weather related, or do you think your share gains are accelerating there?
Well, we'll take a look and see what other people report. Obviously, we'd always like to do more business. The DIY really was the side of the business at the beginning of April that was under a lot of pressure as wet weather didn't allow people to get out and do normal repairs. Some of that business was just deferred to May. When you look at people getting out and cleaning up their cars, that business is lost for the season. We continue to feel like we execute very strongly on the DIY side of the business, and we're going to do everything we can to take all the market share we can.
My follow-up, it could be for Jeff or for you, Tom. Jeff mentioned the 3%-3.5% SG&A per store growth. You're going to stick to that. I think that was about 70 or so basis points of investment. It's probably early to talk about 2019. I wanted to ask if we should expect this to basically just fully go away next year. Is that the right expectation? Is there any debate or logic to having you maintain some level of elevated expenses next year?
Okay. A lot of that will have to do with what the labor market looks like. This year we talked about making that investment because we had additional dollars to work with from the tax change. When we look at next year versus this year, this year we didn't anticipate a lot of tailwinds from inflation within our top line. To the extent that there's broad-based inflation in 2019, we'd expect that to drive expenses higher. We'd also expect to have more tailwind in our top-line performance to drive comp gross margin dollars to offset that.
Okay. Thanks, Tom.
Our next question is from Seth Sigman from Credit Suisse.
Thanks. Good morning, guys. Nice quarter. A couple follow-up questions here. First, just in terms of commercial versus DIY. Your comps overall accelerated in the second quarter versus the first quarter. I'm just wondering, did you see that acceleration in both commercial and DIY? Because obviously DIY was impacted earlier in the quarter, just not clear if the comp was actually lower in Q2 versus Q1.
Yes, Seth, both professional and DIY were positive, DIFM, the professional side, was a larger contributor to comp from the DIY side.
Got it. Just outside of the risk statement around potential impact from gas prices, is it fair to say that you feel better about the state of the DIY business once you got through that April weather and just sort of where you are now?
While it wasn't as strong as the professional side of the business, we're fairly pleased with the DIY side of our business thus far.
Okay. Just to follow up on the investments. When you look at the employee count in the release, it does seem like it stepped up quite a bit this quarter. Can you just give us a sense of where you're investing? Is that store labor or other areas? Thanks.
We're investing obviously in store labor with the opening of all the new stores and the increased focus on customer service. Also some headquarters department adding staff to support omni-channel initiatives and IT primarily.
Okay. Thank you.
Our next question is from Kate McShane from Citi.
Hi. Good morning. Thanks for taking my question. Just to follow up on the question about the incremental investments. Just when are you expecting to see more of a return from those investments? Would it be as early as the second half of the year, or would it be more meaningful for 2019?
Well, Kate, that's a great question. When we look at this year, our comps have accelerated from last year, and we think part of that is due to some of the pressures we saw last year, having more normal weather this year. Also that acceleration has to do with providing better customer service. We feel like we're seeing a return on our investment now. As Jeff mentioned in his prepared comments, in the second quarter, we spent the SG&A dollars we anticipated, drove higher sales, which speaks to controlling those expenses and leveraging better than we had anticipated.
Okay, great. Thank you. My follow-up question is just on the macro drivers. Gas prices are higher, as you mentioned. Is there anything else in the macro environment outside the weather you're keeping an eye on or seems like it's changing and is resulting in you keeping guidance at 2-4, or is it primarily just the higher gas prices at this point?
I think you hit on the big one there, Kate. Gas prices and the potential impact to overall miles driven would be the big economic concern that we would be seeing. Tom or Jeff, do you have anything to add to that?
Yeah. We're in a different environment. We haven't seen proposed tariffs like this in the past. Obviously, a lot of them are proposed. Yesterday there was talk of pulling some of those back, that creates some uncertainty. We'll continue to monitor that situation closely and take the appropriate actions.
Thank you.
Our next question is from Bret Jordan from Jefferies.
Good morning, guys.
Morning, Bret.
Morning.
Hey, as you look at this sort of more expansion in Ohio, mid-Atlantic, how do you think about distribution infrastructure servicing that market that's a bit further from the Devens DC? I guess I'll ask my follow-up question. As you look into those central state markets, is the M&A environment materially different or better there? Are there potentially more targets?
Bret. We are constantly monitoring our distribution capacity across all of our market areas. I'm going to kick this off. I'm passionate, as you guys know, about distribution. I like to talk about distribution, but in fairness to Jeff, I'm going to kick this back to him in a minute. We continue to look for opportunities. We still have capacity in Devens, and we've added capacity, obviously, as Jeff mentioned in his prepared comments to Greensboro. We do keep a very close eye on our distribution capacity and are planning accordingly. Jeff, do you want to add to that?
I think you pretty well covered it. There's obviously a geographical void there that we're going to have to do something about here one of these days.
Okay. I guess the M&A question, obviously there's folks like Eastern down there in the mid-Atlantic, but are there, in those markets, more targets that you would think about? Maybe you could talk about how you think about M&A in general right now.
Every time we go into a new market, we look to see who's selling parts in the market. It might be one store, it might be a chain of stores. See what the opportunity there is to team up with somebody to acquire existing relationships. We have a very technical business, and having parts people is a challenge to continue to generate those internally, so we look for an opportunity to do that. What I would tell you on the M&A front is we are a very disciplined buyer, so we're always looking. We are going to make acquisitions that make sense for us, from a return standpoint.
Okay, great. Thank you.
Our next question is from Elizabeth Suzuki from Bank of America.
Great. Thanks for taking my question. Can you just expand a little further on the comment about short-term pressure on miles driven? It seems like that trend has actually been slowing for quite some time and over the last few years, despite lower average gas prices than in 2014. Do you think this is really a short-term issue, or are there some longer-term headwinds at play here that could impact the growth of the auto aftermarket?
Yeah. What I would say to that, I watched an industry analysis on this yesterday. Some of you may have seen the webinar as well from NPD. I think the three years around the 2014 time that you allude to were a period of higher than normal miles per driven growth across the U.S. I think while this year we're probably lower than the normal increase in miles driven, I don't see that as a long-term trend. Fuel prices have increased for sure, and may continue to increase. I think the consumer has adjusted to these short term one, two, three year swings in fuel pricing, and they don't see that that fuel price will have a long-term impact on their ability to operate their vehicles.
Great. Thank you. Just as you've gone through that list of imported products proposed for tariffs, the 10% tariffs, so that longer list, how much of an impact could there potentially be, assuming no change in where you source your product or prices you would negotiate with vendors or the prices that you could charge to the consumer?
Yeah, like I said earlier, there's a lot of uncertainty across our suppliers, primarily in China, where the bulk of these tariffs are falling. We're working closely with them. We don't know at this point what that exact impact will be. Again, we feel very confident that we'll be able to pass those increases along.
All right. Thanks very much.
Our next question is from Chris Bottiglieri from Wolfe Research.
Hi, thanks for taking the question. I want to start off, it was interesting to hear the inflation being passed through in pricing. I was wondering if you could quantify what like for like pricing's contributed to comps this year, maybe as a proxy for how you could handle inflation next coming years. Start with that.
Tom, you want to take that one?
In aggregate, it's less than 1%. What I would tell you is that category by category, it's been significantly more than that. Even though we've had deflation in aggregate over the last three or four years, we've had certain categories that have had pretty big moves, and we've been successful at passing along those acquisition increases and maintaining our gross margin percentage.
Got you. That's helpful. Just given where, even ignoring tariffs, just looking where steel's priced right now, aluminum, resins, oil, et cetera, I would think that your suppliers, even the Chinese ones, are seeing higher input costs. Can you maybe talk about how those discussions are trending and to what extent you think, even ignoring tariffs, you could see some inflation in the back half or into 2019?
Sure. While there may be more discussions taking place, they're really trending very similar to the way that they always trend. We don't openly take price increases. We push back to our suppliers every day during negotiations. Typically, those conversations will start at a given rate increase and end up either with no increase or a much lower rate increase through the hard work of our merchandise team.
Got you. That's very helpful. Thank you for the time.
Thank you.
Our next question is from Seth Basham from Wedbush Securities.
Thanks, good morning. My question is just on the guidance, the comp guidance, and your decision to hold it flat for the year. When you think about weather, which you said was normal this quarter, and you expect it to be normal on the balance of the year for your guidance, you're also seeing a benefit from inflation. What's leading to the hesitation to increase your, or keep your guidance flat despite the strong year-to-date performance? Is it simply your concerns about potential macro effects, or is there something else?
Sure, Seth. When you look at the quarter, and as I said in my prepared comments, July started out solid, and we're pleased with the results thus far in July. That said, we're roughly 30% through the quarter, and there's a lot of quarter ahead of us. Based on the rising fuel costs that we've talked about, based on potential threats of tariff, based on all the things we talked about that contribute to this, and obviously the thing we've talked about most is the extra Sunday in the quarter that has historically had around a 50 basis point impact. We just felt it prudent to guide it to four.
Fair enough. Thank you.
Our next question is from Scot Ciccarelli from RBC Capital.
Hey, guys. Scot Ciccarelli. A couple questions on your private label business. Specifically, is your private label mix much different online than it is in the stores? Secondly, have you historically seen your private label mix change much in an environment of rising gas prices/lower miles driven?
Yeah, Scot, our private label offering would be the same in store as it would be online. We offer, with the exception of products that are really heavy, that have high shipping cost, or we're unable to ship because of restrictions, pretty much our full product offering that's available in the store would be available online.
I guess I wasn't asking about what was available. I guess I was asking about sell-through or demand.
It's similar.
Okay.
The mix is similar.
Got you. Then have you typically seen, or how much, maybe the right question, Tom, how much have you historically seen private label mix change in an environment of rising gas prices or lower miles driven? I would assume there's some sort of trade-down effect, just trying to get a feel for how much.
Well, every time we see economic uncertainty, there is some pressure on the high-end grades. From a purely private label standpoint, what I would tell you is really the significant growth in our private label is centered around the volume which we do and our ability to source high-quality house brand products in a private label box. Those have been the biggest drivers of the growth in that. Always during economic uncertainty, we see some trade down, which obviously creates a little bit of headwind on our sales, but those products tend to carry a higher gross margin percentage.
Got it. Thanks, guys.
Our next question is from Michael Lasser from UBS.
Good morning. Thanks a lot for taking my question. You talked about a 1% contribution to your comp from inflation. It sounds like that was more than you saw in the first quarter. Was the bulk of the acceleration that you saw in your comp from one Q to two Q driven by accelerating inflation? What have you factored in for the full-year guidance in your comps about inflation?
Hey, Tom, do you want to take that?
Thank you.
I may have misspoke, the number is less than 1%, and it was pretty consistent through the first and second quarters and primarily related to commodity-driven items. Our expectation is that we'll continue to see muted inflation within our guidance to the extent that we don't or we see acceleration of inflation across broader bands, we'd expect to have more tailwinds in our top-line sales.
Tom, as that happens, how will that impact your gross margin?
Whenever we take price increases, our expectation is that we are going to generate more gross profit dollars. There may be some slight pressure on gross margin percentage, but our anticipation is that we're going to drive better comp gross margin dollars. We still anticipate that we will be within the range, as Greg said, but in the lower end of our previously stated gross margin range.
My follow-up question is, can you give us some sense for how much lower April was than the quarter overall in terms of the comp?
We don't give specific numbers, but what we did say in our prepared comments is that we generated positive comparable store sales in April. May was a better month where we saw that pent-up demand release.
Our comment on that.
Thank you.
Next question is from Matt Fassler from Goldman Sachs.
Thanks a lot for taking the questions, guys. Appreciate it. I have two of them today. First of all, you're talking about gas prices, obviously we see the year-on-year increases. We've heard a lot over the past several years as gas has bounced off the bottom about thinking about both percentage changes in gas prices, but also thinking about kind of magic levels, be it $3, $4, what have you. Based on your observations of how consumers have responded to this initial round of energy price increases, really over the past year or two, which do you think at this point is more important? Are you more focused on this now that we're kind of kissing $3 bucks or certainly did so at the seasonal peak a few weeks ago?
Yeah, Matt, we typically don't talk about a given price point at which the consumer changes driving habits because of fuel cost. We talk more about what we think is more important is the rate of price increase. It's been a fairly steady increase. You have some swings based on holiday travel, things like that. Looking forward, if fuel prices continue to rise at a faster rate, then a lot of our lower income consumers will be very selective on where they spend their dollars. If that trend either starts to drop or rise at a very slight rate, we feel like the consumer will bake as much of that into their budget as they can.
My follow-up question relates to the car park. You spoke, I think, generally speaking, about the car park likely being responsible for the stabilization and perhaps improvement in the commercial side of the business. I know that you have very good visibility to the demographics of the cars that you are servicing, year, make, and model, et cetera. Are you seeing within that evidence that this is starting to go your way, that as you make your way through that pause in the flow of older vehicles, that the right kind of cars are coming into your source?
Two comments on that. As we talked about at the beginning of the year, we expected that that headwind from the late SAR years was going to neutralize this year, and we think we've seen that. What we also see on the professional side of the business is from the normal winter weather that we had seen a normal undercar repair level of business, which is primarily a professional job, be where we would expect it to be after being down the last few years.
We've reached our allotted time for questions. I will now turn the call back over to Greg Johnson for closing remarks.
Thank you, John. We'd like to conclude our call today by thanking the entire O'Reilly team for your continued dedication to customer service in the second quarter. I'd like to thank everyone for joining our call today, and we look forward to reporting our 2018 third quarter results in October. Thank you.
Thank you, ladies and gentlemen. This concludes today's conference. Thank you for participating, and you may now disconnect.