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Linear programming model

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Chemco produces a chemical mixture for a specific customer in 1000 pound batches. The mixture contains three ingrediants zinc, mercury, and potassium. The mixture must conform to formula specifications that are supplied by the customer. The company wants to know the amount of each ingredient it needs to put in the mixture that will meet all the requirements of the mix and minimize total cost. The mixture must contain at least 200 pounds of mercury, 300 pounds of a zinc, 100 pounds of potassium, and the ratio of potassium to the other two ingredients cannot exceed 1 to 4. The cost per pound of mercury is 400; the cost per pound of zinc, 180, and the cost per pound of potassium, 90. Formulate a linear programming model and solve by using a computer.

Please help with linear programing model and solve by using a computer. Please help.

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