At best buy they have a stereo system that sells for $2200 and is on sale for 15% and sales tax is 7%. what is the final cost? (note, sales tax will be calculated on the sale price.)

Final cost = $3070.90

Step-by-step explanation:

First we need to find the discount

Discount = original price * percent off

Discount = 2200 * .15

Discount = 330

Sale price = original price - discount

Sale price = 3200-330

Sale price = 2870

Now we need to calculate tax

Tax = sales price times tax rate

Tax = 2870 * .07

     = 200.90

Final price = sales price plus tax

Final price = 2870 + 200.90

                   3070.90