Jerusalem Medical Ltd., an Israeli producer of portable kidney dialysis units and other medical products, develops a 4-month aggregate plan. Demand and capacity (in units) are forecast as follows:

The cost of producing each dialysis unit is $985 on regular time, $1,310 on overtime, and $1,500 on a subcontract. Inventory carrying cost is $100 per unit per month. There is to be no beginning or ending inventory in stock and backorders are not permitted. Set up a production plan that minimizes cost using the transportation method.

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CAPACITY SOURCE Labor Regular time Overtime Subcontract Demand MONTH 1 MONTH 2 MONTH 3 MONTH 4 235 20 12 255 255 24 15 294 290 26 15 321 300 24 17 301