4 David has $100 to spend on clothes for school.
He has a coupon for $10 off when he spends at least $50.
He buys a pair of pants for $27.99, two t-shirts for $12.99 each, and a pair of shoes for
$34.99.
The sales tax is 8% of the total after the coupon is applied.
How much money will David have left after his purchases?