By comparing these numbers against competitors’ numbers as well as against the retail sector (Wal-Mart, Target, Costco Wholesale Corp ( COST ), and Dollar General Corporation ( DG ) are large players in the sector), we can figure out how efficient the business is.
Take context from the input text and decide on the accurate relationship between 'Costco' and 'retail' from the options provided.
Options: subsidiary, currency, creator, industry