Decide how the raw material should be transport with a minimum cost of Z

manually

Company transport raw material from three different manufacturing plants to the warehouses. The supplies and demand requirements at the three plants and warehouses, and the transport cost per unit of raw material are as follows. Warehouses Plants 1 X 1 Y 5 z 9 Supply 100 2 9 1 2 90 3 5 4 3 80 125 60 70 Demand