What is the relationship between Costco and retail in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.
Text: 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.
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