Question

David bought a T.V. that was regularly priced at $649.99. The Sunday newspaper contained an ad that gave David a 20% discount off the regular price. What was the final cost of the T.V. if the sales tax on it was 4.2%?

a) $618.99
b) $627.29
c) $637.69
d) $648.81

Answer 1

The final cost of the T.V. is $541.83.

Step-by-step explanation:

To find the final cost of the T.V., we first need to calculate the amount of discount David receives. The discount is 20% off the regular price of $649.99, which is $129.998. Therefore, the discounted price of the T.V. is $649.99 - $129.998 = $519.992.

Next, we need to calculate the sales tax on the discounted price. The sales tax rate is 4.2%, which is 0.042 as a decimal. So, the amount of sales tax is $519.992 * 0.042 = $21.839664.

Finally, we calculate the final cost by adding the discounted price and the sales tax: $519.992 + $21.839664 = $541.831664. Rounding this to the nearest cent gives us the final cost of $541.83.