The total cost of hard drive is $29.96
Step-by-step explanation:
Given,
Original price = $40
Discount = 30%
Discount amount = 30% of $40 = ![\frac{30}{100}*40](https://tex.z-dn.net/?f=%5Cfrac%7B30%7D%7B100%7D%2A40)
Discount amount=![\frac{1200}{100}= \$12](https://tex.z-dn.net/?f=%5Cfrac%7B1200%7D%7B100%7D%3D%20%5C%2412)
Price after discount = Original price - discount amount
Price after discount = 40-12 = $28
Tax rate = 7%
Tax amount = 7% of price after discount
![Tax\ amount=\frac{7}{100}*28\\Tax\ amount=\frac{196}{100}\\Tax\ amount=\$1.96](https://tex.z-dn.net/?f=Tax%5C%20amount%3D%5Cfrac%7B7%7D%7B100%7D%2A28%5C%5CTax%5C%20amount%3D%5Cfrac%7B196%7D%7B100%7D%5C%5CTax%5C%20amount%3D%5C%241.96)
Total cost of hard drive = Price after discount + Tax amount
Total cost of hard drive = 28+1.96 = $29.96
The total cost of hard drive is $29.96
Keywords: subtraction, addition
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