Costco Sees 5% Comp Increase in February

Costco reported net sales of $5.61 billion for the four weeks ended Feb. 28, 2010, an increase of 11% from $5.06 billion in the same four-week period of the prior fiscal year. Comparable-store sales in the U.S. rose 5%.

For the six-month retail reporting period of September through February, the twenty-six weeks ended February 28, 2010, which includes the first two weeks of the Company’s fiscal third quarter, the Company reported net sales of $38.06 billion, an increase of eight percent from $35.08 billion during the comparable period of the prior fiscal year.

Comparable sales for the 4-week retail-reporting month of February and the 26-week retail-reporting period of September through February were as follows:

                                      4 Weeks   26 Weeks
                                     ---------  ---------
U.S.                                         5%         3%
International                               26%        19%
Total                                        9%         6%
                                     =========  =========

Comparable sales for the 4-week and 26-week periods, excluding the
positive impacts from gasoline inflation and strengthening of foreign
currencies (primarily in Canada, the United Kingdom and Korea), were as
follows:

                                       4 Weeks   26 Weeks
                                      ---------  ---------
U.S.                                          2%         2%
International                                10%         9%
Total                                         4%         3%
                                      =========  =========