The total cost of his order is $30.83
Step-by-step explanation:
Given,
Cost of one DVD = $9.56
Cost of four DVDs = 9.56*4 = $38.24
Discount = 25%
Amount of discount = 25% of 38.24
[tex]Amount\ of\ discount=\frac{25}{100}*38.24\\\\Amount\ of\ discount=0.25*38.24\\\\Amount\ of\ discount=\$9.56[/tex]
Cost of DVD after discount = 38.24-9.56 = $28.68
Sales tax = 7.5%
Sales tax amount = 7.5% of cost after discount
[tex]Sales\ tax\ amount=\frac{7.5}{100}*28.68\\\\Sales\ tax\ amount=0.075*28.68\\\\Sales\ tax\ amount=\$2.15[/tex]
Total cost of order = Discounted price + Sales tax amount
Total cost of order = 28.68 + 2.15 = $30.83
The total cost of his order is $30.83
Keywords: addition, percentage
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