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【多选题】
加权平均边际贡献率等于A.
∑各产品边际贡献率×该产品的销售收入。
B.
∑各产品边际贡献率×该产品的销售比重。
C.
各产品边际贡献之和÷各产品销售收入之和。
D.
各产品销售收入之和÷各产品边际贡献之和。
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