Costco Wholesale Corporation net sales were $5.74 billion for the fiscal month ended July 2, 2006, an increase of 10% from $5.22 billion in the same five-week period of the prior fiscal year. For the forty-four weeks ended July 2, 2006, the Company reported net sales of $48.75 billion, an increase of 11 percent from $43.76 billion during the similar forty-four-week period of the prior fiscal year.

Comparable sales for the 5-week and 44-week periods ended July 2, 2006, were as follows:

5 Weeks   44 Weeks
                  -------   --------
US                   4%        7%
International       14%       10%

Total Company        6%        8%
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