Ferdinand Feed Company receives four raw grains from which it blends its dry pet food. The pet food advertises that each 1-lb packet meets the minimum daily requirements for vitamin C, protein and iron. The cost of each raw grain as well as the vitamin C, protein, and iron units per pound of each grain are summarized in Table 1.

Ferdinand is interested in producing the 1-lb packet at minimum cost while meeting the minimum daily requirements of 6 units of vitamin C, 10 units of protein, and 14 units of iron. The LP formulation to determine the optimal blend for Ferdinand Feed based upon the above requirements is given below.