Given the following information set up the problem in a transportation table and solve for the minimum-cost plan:

PERIOD 1 2 3 Demand 550 700 750

Capacity Regular 500 500 440

Overtime 50 50 50

Subcontract 120 120 100

Beginning inventory 100

Costs Regular time $ 60 per unit

Overtime $ 80 per unit

Subcontract $ 90 per unit

Inventory carrying cost $ 1 per unit

per period Back-order cost $ 3 per unit per period

Suppose that an inventory carrying cost is increased to $2 per unit per period. What will the additional cost of the optimal plan be? (Omit the "$" sign in your response.)

Additional cost $