8. A company is spending Rs 1,200 on transportation of its units from three plants to four distribution centres. The supply and demand of units with unit cost of transportation are given as under:

What can be the maximum saving by optimal scheduling?

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Distribution centres Plants Supply 1 2 3 4 P 20 P2 70 22 30 50 35 40 P3 40 12 60 762 17 7 60 10 25 18 Demand 5 8 7 15