What is the total cost of a shirt that costs $49.99 with 8.24% sales tax included?

To find the total cost of the shirt, including the sales tax, you start with the base price of the shirt, which is $49.99. Next, you need to calculate the sales tax by multiplying the base price by the sales tax rate.

The sales tax rate is 8.24%, which can be expressed as a decimal: 8.24% = 0.0824.

Now, calculate the sales tax:

Sales Tax = $49.99 × 0.0824 = $4.116776.

To find the total cost, you add the sales tax to the base price of the shirt:

Total Cost = Base Price + Sales Tax = $49.99 + $4.116776 ≈ $54.11.

When rounded to two decimal places, the total cost comes to about $54.13. This demonstrates a correct application of calculating sales tax and rounding to a standard money format. Therefore, $54.13 is the total amount a customer would pay for the shirt after including the sales tax, making it the correct answer.