Question: Repeat Problem 75 if the diet is to include exactly 400 units of calcium, 160 units of iron, and 240 units of vitamin A. Problem

Repeat Problem 75 if the diet is to include exactly 400 units of calcium, 160 units of iron, and 240 units of vitamin A.
Problem 75
A dietitian in a hospital is to arrange a special diet composed of three basic foods. The diet is to include exactly 340 units of calcium. 180 units of iron, and 220 units of vitamin A. The number of units per ounce of each special ingredient for each of the foods is indicated in the table.

(A) How many ounces of each food must be used to meet the diet requirements?
(B) How is the diet in part (A) affected if food C is not used?
(C) How is the diet in part (A) affected if the vitamin A requirement is dropped?

Units per Ounce Calcium Iron Vitamin A Food A 30 10 10 Food B 10 10 30 Food C 20 20 20

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