Costco Wholesale Corporation reported net sales of $6.57 billion for the five weeks ended April 6, 2008, an increase of 11% from $5.93 billion in the same five-week period last year.


For the first thirty-one week year-to-date period, net sales increased 12% to $41.34 billion from $36.96 billion last year.

Comparable sales for the five-week and thirty-one-week periods ended April 6, 2008, were as follows:

                               5 Weeks     31 Weeks

                              ———    ———

            US                    5%           5%

            International        17%          17%


            Total Company         7%           7%

                              =========    =========

The U.S. comparable sales figure includes, among other things, the effect of gasoline price inflation, with the average sales price per gallon of gasoline up 20% for the five-week month of March, as compared to the year-earlier March. Excluding gasoline price inflation, U.S. comparable sales would have been up 3%. In addition, foreign exchange rates, primarily in Canada, positively impacted international comparable sales results. On a local currency basis, international comparable sales increased 6% in March.