Costco saw revenue rise more than 7% from year-ago levels, with same-store sales gains of 7.8% after adjusting for the impacts of gasoline prices and foreign exchange rates. Although Costco Wholesale (NASDAQ: COST) has gotten a lot of attention for empty store shelves due to runs on consumer goods by its members, even its quarterly results reflected some of the challenges that companies across the economy are facing due to the coronavirus pandemic. Sales growth isn't enough for Costco Shares of Costco, meanwhile, fell almost 2% Friday morning.