The Greatest Generation Food Company wishes to introduce a new brand of pureed ready-to-eat meals (composed of pureed chicken and pureed liver meat products) that meets certain nutritional requirements. The liver-flavored product contains 1 unit of nutrient A and 2 units of nutrient B, while the chicken-flavored product contains 1 unit of nutrient A and 4 units of nutrient B. According to federal requirements, there must be at least 40 units of nutrient A and 60 units of nutrient B in a package of the new meals. In addition, the company has decided that there can be no more than 15 units of liver-flavored meat product in a package. It costs cent to make a liver-flavored product and 2 cents to make a chicken-flavored product. Formuiate the linear programming model for this problem.