A restaurant offers the following limited lunch menu:. Main Courses: Beef, Pork Roast, Duck, Quiche. Vegetables: Broccoli, Carrots, Potatoes. Beverages: Coffee, Tea, Milk, Soda, Shakes. Desserts: Ice Cream, Brownies. If one item is selected from each of the four groups, in how many ways can a meal be ordered?.