An animal feed to be mixed from soybean meal and oats must contain at least120 lb of protein, 27 lb of fat, and 10 lb of mineral ash. Each sack of soybeans costs $15 and contains 50 lb of protein, 9 lb of fat, and 55 lb of mineral ash. Each sack of oats costs $5 and contains 15 lb of protein, 5 lb of fat, and 1 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost?
Solution Image (with instructions) below and the table sheet for reference below that.
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Requirements |
Decision variables |
Objective function: MINIMIZE total cost |
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40 |
<-- |
Total cost of soyabean and oats sacks (Should be minimized) |
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protein |
120 |
soyabean |
2 |
Use add-in Solver; green cell: objective function; minimize Yellow cells are decision variables; Constraints are as below |
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fat |
27 |
oats |
2 |
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mineral ash |
10 |
Constraints |
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Products |
130 |
>= |
120 |
<-- |
Total proteins should be atleast as much as required |
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cost |
protein |
fat |
mineral ash |
28 |
>= |
27 |
<-- |
Total fats should be atleast as much as required |
|||||||
soyabean |
15 |
50 |
9 |
55 |
112 |
>= |
10 |
<-- |
Total mineral ashes should be atleast as much as required |
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oats |
5 |
15 |
5 |
1 |
2 |
is |
integer |
<-- |
Total sacks of soyabeans should be an integer |
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2 |
is |
integer |
<-- |
Total sacks of oats should be an integer |
An animal feed to be mixed from soybean meal and oats must contain at least120 lb...
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