Hello, I'm Andrew Yoon, AVP of Finance and Investor Relations, and I'll review our sales results for the five-week retail month of September, which started on Monday, August 31st, and ended on Sunday, October 4th. This period is compared to the five weeks that began last year on Monday, September 1st, and ended on Sunday, October 5th. This recording will include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements involve risks and uncertainties that may cause actual events, results, and/or performance to differ materially from those indicated by such statements. The risks and uncertainties include, but are not limited to, those outlined in this recording and today's sales release, as well as other risks identified from time to time in the company's public statements and reports filed with the SEC.
Forward-looking statements speak only as the date they are made, and the company does not undertake to update them except as required by law. Comparable sales and comparable sales excluding all gasoline sales and the impact of foreign exchange are intended as supplemental information and are not a substitute for net sales presented in accordance with the U.S. GAAP. As reported in our release, net sales for the month came in at $30.02 billion, an increase of 13% from $26.58 billion last year. Reported comparable sales for the month were as follows: U.S. 12.5%, Canada 6.3%, Other International 10.8%. Comparable sales for the month, excluding the impacts from changes in gasoline prices and foreign exchange, were as follows: U.S. 8%, Canada 4.9%, Other International 7.7%.
Digitally enabled sales, which are sales initiated through a digital device whether fulfilled through a warehouse, distribution center, or Costco Travel, increased year-over-year as follows: reported 19%, excluding foreign exchange 19.1%. Labor Day in the U.S. and Canada occurred one week later this year. The shift positively impacted September total comparable sales by a little more than 50 basis points. Total company comparable sales for the month, excluding all gas sales and the impact of foreign exchange, were approximately 7.5%. Our comp traffic or frequency for the month was up 4.7% worldwide and 4.3% in the U.S. Foreign currencies year-over-year relative to the U.S. dollar impacted total and comparable sales as follows: Canada negatively by approximately 1%, Other International positively by approximately 1.2%, and total company approximately flat. Gas price inflation positively impacted total reported comp sales by approximately 3.8%.
The average worldwide selling price per gallon was up 32.8% versus last year. Worldwide, the average transaction was up 6.4%, which includes the impacts from gas inflation and FX. Excluding gas inflation and FX, average transaction was up 2.8%. In terms of regional merchandising categories, the general highlights were as follows. U.S. regions with the strongest comparable sales were the Midwest, Southeast, and San Diego. Other international and local currencies, we saw the strongest results in Spain, Taiwan, and China. The negative impact of cannibalization was approximately 60 basis points. Moving to merchandising highlights, the following comparable sales results by category for the month exclude the impact of foreign exchange. Foods and sundries were positive mid-single digits. Better performing departments included sundries, food, and frozen food. Fresh foods were up mid to high single digits. Better performing departments included bakery and meat. Non-foods were positive high single digits.
Better performing departments included gift cards, housewares, and sporting goods. Ancillary sales were up mid-30s. Gas, pharmacy, and food court were the top performers. Gas was up mid-40s, driven by price per gallon changes year-over-year and high single-digit comparable gallon growth. Looking ahead, the October reporting period will include the four weeks beginning October 5th and ending November 1st, 2026, compared to the four weeks beginning October 6th and ending November 2nd, 2025. If you have any investor relations questions, please call Josh Dahmen at 425-313-8254, Bryan Starnes at 425-427-7403, or me at 425-313-6305. This recording will be available until 4:00 P.M. Pacific Time Wednesday, October.