Costco Wholesale CorporationCOST reported flat comparable-store sales (comps) for the month of June (the five weeks ended Jul 3, 2016). However, excluding the adverse impact of foreign currency fluctuations and deflation in gasoline prices, Costco's comps for the month under review rose 3%. Costco reported flat comps for the 44-week period ended Jul 3, 2016, incorporating a 2% increase across its U.S. locations, offset by a 4% decline at both its Canadian and Other International locations.