ISSAQUAH, Wash. — Costco reported net sales of $8.1 billion for May 2013, an increase of 7% from $7.6 billion during the same period last year.
For the 39-week period ended June 2, the company reported net sales of $77 billion, an increase of 8% from $71 billion during the same period last year.
The company’s same-store sales rose 5% in May, but they were lower than anticipated because of the negative impact of changes in gasoline prices and foreign exchange rates.