Has Natasha Been Overcharged for Her Online Purchase?

Is Natasha's total bill correct for her online purchase?

A. Natasha has been billed correctly.

B. Natasha has not been charged enough for her purchase.

C. Natasha has been overcharged by $1.85 for her purchase.

D. Natasha has been overcharged by $8.20 for her purchase.

Calculation of Natasha's Total Bill for Online Purchase

To determine if Natasha has been billed correctly for her purchase, we need to calculate the total cost including the books, taxes, and shipping charges.

Natasha made an online purchase of 3 hardcover books for $19.95 each and 1 book on tape for $17.43. The total cost of the books is calculated as follows:

3 hardcover books * $19.95 = $59.85

1 book on tape * $17.43 = $17.43

Subtotal (cost of the books): $59.85 + $17.43 = $77.28

The taxes on the total purchase price are 7.25% of $77.28, which amounts to $5.60. Adding the taxes to the subtotal gives us:

Total purchase price (including taxes): $77.28 + $5.60 = $82.88

Based on the shipping charges table, the standard shipping fee for a purchase up to $50 is $5.10. Therefore, the total amount Natasha should be charged is:

Total amount Natasha should be charged: $82.88 + $5.10 = $87.98

The company actually billed Natasha's credit card $91.08, which means she has been overcharged. The correct amount Natasha should be charged is $87.98.

The difference between the billed amount and the correct amount is $91.08 - $87.98 = $3.10. Therefore, Natasha has been overcharged by $3.10 for her purchase.