Q$\mathrm{.}7$ Set. $($B$)$ Bosch has established a distribution network for the supply of washing machines from its three plants to three warehouses. The current network has the following characteristics:

COSTS Warehouse $1$ Warehouse $2$ Warehouse $3$ Supply

Ambala $869300$

Vellore $10912500$

Goa $743400$

Demand $350450400$

The unit costs, supply and demand are given in the table. Apply NWC method to identify the initial feasible solution and further identify optimal solution.