Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.

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.

Answer: industry: Costco, retail