Your company asks you to prepare an aggregate production plan for the coming 9 planning periods where each period is composed of 4 weeks: Planning period 1 2 3 4 5 6 7 3 9 Forecasted demand 1200 1500 2000 2000 2200 1300 1500 1300 1500 Given that you have 10 workers, that the production time is 1 hour per unit, the working time is 8 hours per day, 5 days per week and 20 days per planning period. The unit invenmry holding cost is 25 per period and shortage cost is 20$ per unit and per time period. Demand not met is carried over to the next planning period The management warns to keep a constant workforce but you can use overtime hours not exceeding one hour per day and per worker. All workers should do the same overtime hours at a cost of 15$ per hour