【多选题】【消耗次数：1】
下列指标中属于相关比率的有（ ）。
①
产值成本率
②
成本降低率
③
成本利润率
④
销售收入成本率
参考答案：
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销售利润率的计算公式是（营业收入-营业成本-税金及附加）除以[填空1]
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counted for
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