You work for Sub-Zero, a luxury appliance manufacturer, that makes refrigeration products in Goodyear, Az. You have these aggregate demand requirements for the next six months. Forecast Month Demand 220 160 200 210 Costs and other data Previous output level (units) Beginning inventory (units) Stockout cost (per unit) Inventory holding costs (per unit/month) Unit cost, regular time (per unit) Subcontracting (per unit) Unit cost, overtime (per unit) Hours per employee per month Labor standard (hours per unit) Cost of hiring workers (per unit) Cost of firing workers (per unit) 150 100 $250 $100 $1,200 $2,000 $1,500 160 16 $200 $500 Last month 150 units were produced. How many employees were required to produce these 150 machines