Deflation in gasoline prices and adverse foreign currency fluctuations marred Costco's comps. However, The Gap Inc. GPS posted a 1% decline in comps, while Costco Wholesale Corporation COST posted flat comps for the month. Click to get this free report COSTCO WHOLE CP (COST): Free Stock Analysis Report GAP INC (GPS): Free Stock Analysis Report BUCKLE INC (BKE): Free Stock Analysis Report L BRANDS INC (LB): Free Stock Analysis Report To read this article on Zacks.com click here.