Natasha has been over charged by $1.85 for her purchase. The correct option is - c. Natasha has been over charged by $1.85 for her purchase
Calculating the bill of a purchase
From the question, we are to determine if Natasha has been billed correctly for her purchase
From the given information,
She purchased
3 hard cover books for $19.95 each
3 × $19.95 = $59.85
and
1 book on tape for $17.43
1 × $17.43 = $17.43
Total purchase = $59.85 + $ 17.43
= $77.28
But, the site says that taxes paid by the customer are 7.25% of the total purchase price
∴ The tax Natasha would pay = 7.25% × $77.28
= 0.0725 × $77.28
= $5.60
Add to the total purchase,
Present bill = $77.28 + $5.60
Present bill = $82.88
Then, she selects standard shipping.
According to the shipping charges,
For amount of purchase between $50 - $100, Standard shipping costs $6.35
∴ Total bill = $82.88 + $6.35
Total bill = $89.23
But, the company bills her credit card $91.08
Since, $91.08 is more than her total bill, $89.23, then, Natasha has been over charged.
$91.08 - $89.23 = $1.85
Hence, Natasha has been over charged by $1.85 for her purchase. The correct option is - c. Natasha has been over charged by $1.85 for her purchase.
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