By Daniel Kline The Costco warehouse club has been hesitant to pass on price increases to customers, but two popular menu items in its food court now cost more. Costco (COST) – Get Costco Wholesale Corporation Report exists to serve its members. The warehouse club essentially makes a deal with the people who pay $60 a year for Gold Star membership or $120 a year for Executive membership: In exchange for those fees, the retailer offers goods at very low prices. That bargain is something the chain has taken very seriously, even as supply-chain issues and inflation have pushed its costs higher. S…