(Transportation Problem) A company has two plants produ

(Transportation Problem)
A company has two plants producing a certain product that is to be shipped to three distribution centers. The unit production costs are the same at the two plants and the shipping cost per unit is shown below.
Distribution
Center 2 3
A 54 56 54
Plant
B 56 55 52
Shipments are made once per week. During each week each plant produces at most 60 units and each distribution center needs at least 40 units. How many units should be shipped from each distribution center to each distribution center so as to minimize cost?
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