【单选题】【消耗次数：1】
在ABC控制系统中，下列说法不正确的是（ ）。
①
A类存货金额巨大（50%至70%），品种数量少（10%至15%），应分品种重点管理
②
B类存货金额一般（15%至20%），品种数量相对较多（20%至25%），应分类别一般控制
③
C类存货金额很小（10%至35%），品种数量繁多（60%至70%），应按总额灵活掌握
④
C类存货金额很小（20%至50%），品种数量繁多（60%至70%），应按总额灵活掌握
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