Adds details on results, background May 26 (Reuters) - Costco Wholesale Corp COST.O beat Wall Street estimates for quarterly revenue on Thursday, boosted by strong consumer spending on its fresh food, home furnishings and fuel offerings amid surging inflation. An average shopper at Costco makes more than a typical Walmart WMT.N and Target TGT.N customer, and the warehouse club operator's efforts to keep gas prices several cents below the national average has driven memberships. Its results come at a time when Walmart posted a fall in revenue due to the impact of decades-high inflation hitting consumer spending.