Given the following cost information and the aggregate plan below: Quarter Demand 500 units 1 800 $16 per unit Previous production level Inventory holding cost Hiring workers Laying off workers 2 400 $46 per unit 3 1000 $96 per unit 4 700 $160 per unit Subcontracting cost Regular time production cost $105 per unit Quarter Demand Ending Inventory Subcontract Hiring Regular time production 500 Laying Off 0 0 1 800 600 0 200 100 0 2 400 600 200 0 0 0 3 1000 600 0 200 0 0 4 700 600 0 100 0 0 Calculate the overall cost for quarters 1 to 4, including production costs, subcontracting, inventory, hiring, and layoff costs. Do not consider the regular time production cost from quarter 0 and the cost of the inventory from quarter 0