Consider the transportation table below The solution displayed was obtained by performing some derations of the transportation method on this problem Source 1 Destination 2 $30 3 530 59 Capacity 50 40 10 510 $10 $10 B 30 30 520 $23 75 45 SO 30 Demand 10 The total cost of the current solution provided 2075 dollars Using stepping stone method to perform an improvement iteration, the improvement index for the nined cell will be A-240 8-1-40 B-=-15 C-1 - 30 Based on the improvement index for each of the unused cells in the first improvement feration unused cell B - 1 should get an assignment of units