Q2 (10%) A company supplies its four retail outlets, 01, 02, 03 and 04, from its four plants, P1, P2, P3 and P4. The shipping costs per shipment from each plant to each retail outlet is given in Table 2. Plants P1, P2, P3 and P4 make 20, 20, 20 and 10 shipments per month. Retail outlets 01, 02, 03 and 04 receive 20, 20, 20 and 10 shipments per month. Use Vogel's method to solve the transportation problem, and then use the loop method to find the optimal solution. Table 2 Unit Shipping Cost 01 02 03 04 Shipping P1 $600 $600 $400 $200 20 P2 $200 $900 $100 $300 P3 $300 $400 $200 $100 P4 $200 $100 $300 $200 2222 20 20 10 Receive 20 20 20 10