Here the selling expense is chosen as decision variance.

销售费用被作为决策变量。

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In the selling expenses control, the travel expense how to limit and so on.

销售费用控制中，差旅费如何界定等。

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In the selling expenses control, the travel expense how to limit and so on.

销售费用控制中，差旅费如何界定等。

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