1. What is the decision variable

2. What is the objective function

3. List the constraints

Joyce and Marvin run a daycare for preschoolers. They are trying to decide what to feed the children for Lunch. They would like to keep their costs as low as possible, but they must also meet various nutritional requirements, so the children are healthy. They have decided to go with Peanut Butter and Jelly sandwiches, and some combination of Graham Crackers, Milk \& Orange Juice. The nutritional content of each food choice and its cost are given in the table below: The Nutritional requirements are as follows. Each child should receive between 400 and 600 calories. No more then 12 grams of fat. Each child should consume at-least 60mg of Vitamin C and at-least 12 grams of Protein. Furthermore, for practical reasons, each child needs exactly 2 slices of bread (to make the sandwich), at least twice as much Peanut Butter as Jelly (as Peanut Butter is more Delicious), and at-least 1 cup of liquid (Milk and /or Orange Juice). Joyce and Marvin would like to select the food choices for each child that minimizes cost while meeting the above requirements