Issaquah, Wash.-based Costco Wholesale Corp has announced its operating results for the Q3 and the first 36 weeks of FY 2002, ended 12 May 2002. Net sales for the Q3 2002 increased 12% to US$8.44bn from US$7.56bn during the third quarter of fiscal 2001. On a comparable warehouse basis, that is warehouses open at least a year, net sales increased 6%.