The Cost-Less Corp. supplies its four retail outlets from its four plants. The shipping cost per shipment from each plant to each retail outlet is given below.

Plants 1, 2, 3, and 4 make 10, 20, 20, and 10 shipments per month, respectively. Retail outlets 1, 2, 3, and 4 need to receive 20, 10, 10, and 20 shipments per month, respectively.
The distribution manager, Randy Smith, now wants to determine the best plan for how many shipments to send from each plant to the respective retail outlets each month. Randy€™s objective is to minimize the total shipping cost.
(a) Formulate this problem as a transportation problem by constructing the appropriate parameter table.
(b) Use the northwest corner rule to construct an initial BF solution.
(c) Starting with the initial basic solution from part (b), interactively apply the transportation simplex method to obtain an optimal solution.

Unit Shipping Cost Retail Outlet 2 4 $500 $200 $300 $200 $600 $900 $400 $100 $400 $100 $200 $300 $200 $300 $100 $200 Plant 4