【单选题】【消耗次数：1】
（ ），是指边际贡献在销售收入中所占的百分率。
①
变动成本率
②
边际贡献率
③
销售利润率
④
销售净利率
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相关题目
【多选题】
关于边际贡献率的公式中，正确的有（ ）。
①
边际贡献率＝边际贡献总额/销售收入
②
边际贡献率＝单位边际贡献/单价
③
边际贡献率＝1－变动成本率
④
边际贡献率＝单位变动成本/单价
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