Costco Inc. reported that sales grew 15 percent in September, to $8.61 billion from $7.51 billion. Comps grew 12 percent with U.S. comps ahead 11 percent and international ahead 14 percent.

Comparable sales for the five-week period, excluding the positive
impacts from gasoline inflation and foreign exchange, were up 8 percent. U.S. comps were ahead 7 percent and international comps advanced 10 percent.

Both this year's and last year's five-week periods include sales from Mexico.