Formulate a integer programming model and solve the model.

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Chapter 5, Problem 17P

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In the following sawtooth inventory profile diagram, two inventory plans with different order quantities (Q) and different frequencies of delivery are shown; order quantity for Plan A = 200 units and Plan B = 50 units. i). Total demand (D) is 350 units, the holding cost per unit (Ch) is equal to (£0.8) and the ordering cost per order (Co) is (£12.5). Calculate the total costs for each plan and state which one is more preferable along with the reason why. ii). There is a stark difference in the composition of the total costs of Plans A and B. Explain this difference and why it occurs. Use the breakdown of costs for each plan to help illustrate your answer.

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