A car manufacturer is planning production for next year. The forecasted demand for the next 12 months are: 940, 790, 360, 720, 270, 130, 160, 300, 990, 290, 280 and 790. Workers are paid $5000 per month. The cost of hiring a worker is $4000 and the cost of firing a worker is $6000. Workers are hired and fired at the beginning of each month. All workers at the end of one month are available to work the next month. Each worker can produce up to eight cars per month. The holding cost per car is $500 a month. At the beginning of month 1, there are 500 cars in inventory and 60 workers. How can the company minimize the cost of meeting demand