If you go out to eat with three friends and your meal was $72.50 there's a 6.75% sales tax and you should tip the waiter 15%. how much should each person pay?

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?