Total Cost Calculation for Online Purchase

Has Natasha been billed correctly for her 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.

Answer:

The answer is Option C. Natasha has been overcharged by $1.85 for her purchase.

To determine if Natasha has been billed correctly for her purchase, we need to calculate the total cost including 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, resulting in a subtotal of $77.28. Taxes paid by the customer are 7.25% of the total purchase price, which is approximately $5.60 in this case.

Looking at the shipping charges table, since the total purchase amount falls within the $50 up to $100 range, the standard shipping charge is $6.35. Adding the subtotal, tax, and shipping charge, we get a total of $89.23.

However, the company billed Natasha's credit card $91.08 for the total online purchase, resulting in an overcharge of $1.85. The correct amount that Natasha should have been billed is $89.23.

In conclusion, Natasha has been overcharged by $1.85 for her purchase. It's important to double-check the total cost calculation to ensure accurate billing for online purchases.