A dietitian in a hospital is to arrange a special diet composed of three basic foods. The diet is to include exactly 140 units of calcium, 100 units of iron, and 140 units of vitamin A. The number of units per ounce of each special ingredient for each of the foods is indicated in the table. Construct a mathematical model to complete parts (A) through (C) below. Use Gauss-Jordan elimination to solve the model and then interpret the solution.
(A) How many ounces of each food must be used to meet the diet requirements?
