Question

Find the total cost: The cost of a microwave oven was $129. The sales tax rate is 7.5% of the purchase price


$9.68


$12.90


$138.68


$7.55

Answer 1

To find the total cost of the microwave oven including sales tax, we first need to calculate the sales tax amount. The formula for sales tax is:

\[
\text{Sales Tax} = \text{Purchase Price} \times \text{Sales Tax Rate}
\]

Given:

- Purchase Price = $129
- Sales Tax Rate = 7.5% = 0.075

Now, calculate the sales tax:

\[
\text{Sales Tax} = 129 \times 0.075 = 9.675
\]

Rounding to two decimal places, the sales tax is approximately $9.68.

Next, we add the sales tax to the purchase price to find the total cost:

\[
\text{Total Cost} = \text{Purchase Price} + \text{Sales Tax}
\]
\[
\text{Total Cost} = 129 + 9.68 = 138.68
\]

So, the total cost is **$138.68**.