• Example 5 The mathematics club and gaming club are having a shared meeting and decided to order pizza, sub sandwiches, and iced tea. The mathematics club wants 8 pizzas, 4 sub sandwiches, and 22 iced teas. The gaming club wants 15 pizzas, 10 sub sandwiches, and 11 iced teas. If pizzas cost $14 each, sub sandwiches cost $7 each, and iced teas cost $2.50 each, use matrices to determine how much money each club will spend on food and drinks.