A dietician has two foods with which to prepare a diet containing at least 400 units of calcium, 175 units of iron, and 280 units of vitamin A. The table below gives the units of calcium, iron,
and vitamin A per ounce for the two foods.
Calcium
Iron
Vitamin A
Food I
12
14
10
Food II
20
12
25
Food I costs 35 cents an ounce and Food II costs 42 cents an ounce. What combination of the
two foods gives the diet, meeting the above requirements, of minimum costs?
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