Cost to ship one unit from factory 1 to warehouse A A B C D Supply 4 7 7 1 Factory 1 can supply 100 100 units per period 12 3 8 8 Factory 2 200 8 10 16 5 3 150 Demand 450 Total supply capacity 80 90 120 160 per period 450 Warehouse B can use Total demand 90 units per period per period