The first question I do not know how to deal with and the second question I do not know where I am wrong.

Dana Johnson Corp. is considering adding a fourth plant to its three existing facilities in Decatur, Minneapolis, and Carbondale. Both St. Louis and East St. Louis are being considered. Evaluating only the transportation costs per unit as shown in the table, decide which site is best. To Blue Earth Ciro Des Moines Capacity Decatur $20 $25 $22 400 From Existing Plants Minneapolis Carbondale $17 $21 $27 $20 $25 $22 300 150 Demand 400 200 450 From Proposed Plants East St. Louis St. Louis $27 $30 $28 $30 $31 200 200 To Blue Earth Ciro Des Moines Capacity $29 Click the icon to view the optimal solution with a new plant in East St. Louis. Click the icon to view the optimal solution with a new plant in St. Louis. Using the optimal solutions provided above, Dana Johnson Corp. should select with a total cost of $ (enter your response as a whole number). The following table presents cost, capacity, and demand data for a transportation problem in Jinfeng Yue's furniture company. From\To 1 3 A $30 $10 $20 40 B 2 $10 $10 $10 60 Capacity 20 30 75 $5 $10 $25 55 Demand Set up the appropriate transportation table and find the initial solution using the northwest-corner rule. Note that a "dummy" source is needed to balance the problem (enter your responses as whole numbers). (Note: You must enter a shipment in every cell, even if the shipment is 0.) From To 1 2 3 Capacity $30 $10 $5 A 20 0 20 $10 $10 $10 B 10 | 30 $20 $10 $25 0 50 25 75 $0 $0 $0 Dummy 0 0 30 | Demand 40 60 55 155 20 Dana Johnson Corp. is considering adding a fourth plant to its three existing facilities in Decatur, Minneapolis, and Carbondale. Both St. Louis and East St. Louis are being considered. Evaluating only the transportation costs per unit as shown in the table, decide which site is best. To Blue Earth Ciro Des Moines Capacity Decatur $20 $25 $22 400 From Existing Plants Minneapolis Carbondale $17 $21 $27 $20 $25 $22 300 150 Demand 400 200 450 From Proposed Plants East St. Louis St. Louis $27 $30 $28 $30 $31 200 200 To Blue Earth Ciro Des Moines Capacity $29 Click the icon to view the optimal solution with a new plant in East St. Louis. Click the icon to view the optimal solution with a new plant in St. Louis. Using the optimal solutions provided above, Dana Johnson Corp. should select with a total cost of $ (enter your response as a whole number). The following table presents cost, capacity, and demand data for a transportation problem in Jinfeng Yue's furniture company. From\To 1 3 A $30 $10 $20 40 B 2 $10 $10 $10 60 Capacity 20 30 75 $5 $10 $25 55 Demand Set up the appropriate transportation table and find the initial solution using the northwest-corner rule. Note that a "dummy" source is needed to balance the problem (enter your responses as whole numbers). (Note: You must enter a shipment in every cell, even if the shipment is 0.) From To 1 2 3 Capacity $30 $10 $5 A 20 0 20 $10 $10 $10 B 10 | 30 $20 $10 $25 0 50 25 75 $0 $0 $0 Dummy 0 0 30 | Demand 40 60 55 155 20