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06 5B. A manufacturer has the following information on its major product. R.T. production capacity = 2600 units/period, O.T. production capacity = 300 units/period, R.T. cost = Rs.100/unit, Incremental O.T. cost = Rs. 20/unit, Inventory carrying cost = Rs. 10/unit/period, Back order cost = Rs.20/unit/period. Beginning Inventory = 400 units. Demand for periods 1, 2, 3 and 4 are 4000, 3200, 2000 and 2400 units respectively. Develop the aggregate plan so that there will be zero inventory at the end of period 4 and determine the total cost of the plan. The cost of unutilized capacity during regular time is Rs. 50/unit