Freida goes to McDonald's with her friends. They buy 3 Big
Macs, 1 Chicken Nuggets, 2 Fish-O-Filet, 6 French Fries and 6
Cokes. McDonald's also charges 8.25% sales tax. How much will
Freida and her friends pay for the meal, including taxes. If
Freida pays the cashier $80, how much change will she get back?