某商品按20%利润定价,然后按8.8折卖出，共获得利润84元，求商品的成本是多少元？

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25985' and id < 2181037 and id<>'2181037' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25985' and id > 2181037 and id<>'2181037' order by id asc limit 5