A TV has a listed price of $663.95 before tax. If the sales tax rate is 7.5% , find the total cost of the TV with sales tax included.

Round your answer to the nearest cent, as necessary.

The sales tax on the TV can be found by multiplying the listed price by the sales tax rate:

$663.95 x 0.075 = $49.80

To find the total cost of the TV with sales tax included, we need to add the sales tax amount to the listed price:

$663.95 + $49.80 = $713.75

Rounding this answer to the nearest cent gives us: $713.75. Answer: \boxed{713.75}.

To find the total cost of the TV with sales tax included, you can use the following formula:

Total Cost = Listed Price + (Listed Price × Sales Tax Rate)

Given that the listed price is $663.95 and the sales tax rate is 7.5% (or 0.075), we can substitute these values into the formula:

Total Cost = $663.95 + ($663.95 × 0.075)

Calculating this:

Total Cost = $663.95 + ($49.80)

Total Cost = $713.75

Therefore, the total cost of the TV with sales tax included is $713.75.