4. Farnsworth Tire Company would like to develop an aggregate plan via the transportation method. Data that relate to production, demand, capacity, and cost at its West Virginia plant are shown in Table: Sales Period March April May Demand 800 1,000 750 city Regular Overtime Subcontracting Beginning Inventory 700 700 700 50 50 50 150 150 130 100 tires COSTS Regular time $40 per tire $50 per tire $70 per tire $2 per tire per month Overtime Subcontract Carrying Cost Solve the planning problem by minimizing the costs of matching production in various periods to future demands.