Retailers such as Rite Aid Corporation RAD and Zumiez, Inc. ZUMZ witnessed comps growth of 4.3% and 5.5%, respectively, during March. Click to get this free report COSTCO WHOLE CP (COST): Free Stock Analysis Report RITE AID CORP (RAD): Free Stock Analysis Report ZUMIEZ INC (ZUMZ): Free Stock Analysis Report BURLINGTON STRS (BURL): Free Stock Analysis Report To read this article on Zacks.com click here. Excluding the effect of deflation in gasoline prices and the impact of foreign currency fluctuations, Costco's comps for March rose 4%, reflecting comparable sales growth of 4% both at its U.S. and international outlets.