Under certain conditions, the ratio between profit dedication and advertising cost should be equal to the point of equilibrium of advertising investment.
在一定条件下，利润贡献与广告成本的比值等于广告投入保本点的销售量。
Under certain conditions, the ratio between profit dedication and advertising cost should be equal to the point of equilibrium of advertising investment.
在一定条件下，利润贡献与广告成本的比值等于广告投入保本点的销售量。
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