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Given a series discount of 20/10/10/20 what is the net cost equivalent?

User Chad Grant
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The net cost equivalent is the price the customer pays after deducting all the discounts. To find the net cost equivalent given an amount n of discounts, we use the following formula


N=(1-d_1)(1-d_2)\ldots(1-d_n)

Where d is the discount written as a decimal.

In our problem, we have a series discount of 20/10/10/20, therefore, the net cost equivalent is


\begin{gathered} N=(1-0.20)(1-0.10)(1-0.10)(1-0.20) \\ =(0.8)(0.9)(0.9)(0.8) \\ =0.5184 \end{gathered}

User Dan Frank
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