By Daniel Kline The warehouse club faces questions about some popular food items and its membership fee given current economic conditions. Warehouse club members expect value. You pay Costco (COST) – Get Costco Wholesale Corporation Report, Walmart’s (WMT) – Get Walmart Inc. Report Sam’s Club, or BJ’s Wholesale (BJS) a membership fee in exchange for getting access to their “clubs” where you pay less for groceries, household items, and more. It’s a good deal for the members who get to lock in low prices. The arrangement also works well for the company as they lock in a captive customers base an…