The given transportation problem is unbalanced $.$

To balance the given transportation problem, a dummy $$ should be added.

To balance the given transportation problem, the demand for the introduced dummy should be $$

The starting solution using the northwest$-$corner method is:

$($Not: You mustentera stipment in every cell, even it the sthimentis o$.)$

$$

The total cost of the initial solution developed using the northwest$-$corner method $=$$