The original price of assure that is 15 dollars the price of the shirt is discounted by 20% than a 4% sales tax is added added
The discounted price of the shirt after a 20% discount would be:
$15 - ($15 * 0.20) = $15 - $3 = $12
Then, a 4% sales tax is added to the discounted price:
$12 + ($12 * 0.04) = $12 + $0.48 = $12.48
So, the final price of the shirt after the discount and sales tax is $12.48.