To calculate the selling price per box after applying a 9% discount on the normal selling price of R250, follow these steps:
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Calculate the amount of the discount: \[ \text{Discount} = \text{Normal Selling Price} \times \left(\frac{\text{Discount Rate}}{100}\right) \] \[ \text{Discount} = 250 \times \left(\frac{9}{100}\right) = 250 \times 0.09 = 22.50 \]
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Subtract the discount from the normal selling price to find the selling price after discount: \[ \text{Selling Price After Discount} = \text{Normal Selling Price} - \text{Discount} \] \[ \text{Selling Price After Discount} = 250 - 22.50 = 227.50 \]
Therefore, the selling price per box after the discount is R227.50.