Question 889647
The original price of the sweater = $60
.7 (100%-30%) * $60 = $42
Why would he have to pay sales tax on the ORIGINAL price instead of the sell price?  But, assuming he does, the sales tax adds $60 * .072, or $4.32 to the price.
$42 + $4.32 = $46.32
Subtract the gift certificate
$46.32 - $20.00 = $26.32 out of pocket