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A manufacturer has 4 warehouses and 5 vendors all in different cities. In the first warehouse there are 50 products, in the second warehouse there are 70 products, in the third warehouse there are 90 products and in the fourth warehouse there are 90 products. Demand of the first vendor is 80 products, demand of the second vendor is 50 products, demand of the third vendor is 60 products, demand of the fourth vendor is 70 products and demand of the fifth vendor is 40 products. Unit transportation costs from the warehouse to the vendor are given in the following table. Vi V2 V3 V4 V5 W1 9 8 4 13 3 5 Capacity 50 70 W2 2 11 10 11 W3 9 6 4 12 9 90 W4 7 10 15 7 5 90 Demand 80 50 60 70 40