Method

Total transportation cost

Ex. 1

Ex. 2

Ex. 3

Ex. 4

North West Corner Method

4400

4160

540

1500

Row Minimum Method

2850

4120

470

1450

Column Minimum Method

3600

3320

435

1500

Least Cost Method

2900

3500

435

1450

Vogel’s Approximation Method

2850

3320

470

1500

Extremum Difference Method

2850

3620

415

1390

Highest Cost Difference Method

2900

3620

435

1450

Average Cost Method

2900

3320

455

1440

TOCM-MMM Approach

2900

3620

435

1450

TOCM-VAM Approach

2850

3320

430

1450

TOCM-EDM Approach

2850

3620

415

1440

TOCM-HCDM Approach

2900

3620

435

1450

TOCM-SUM Approach

2850

3320

455

1440

Proposed Approach (ATM)

2850

3320

415

1390

Optimal Solution

2850

3320

410

1390