IT gadget Sdn Bhd is a portable hard disk manufacturer in need of an aggregate plan for July through December. The company has gathered the following data: Holding cost Subcontracting Regular time labor Overtime labor Hiring cost Firing cost Table 2 Cost RM8/unit/month RM80/unit RM12/hour RM18/hour for hours above 8 hours/worker/day RM40/worker RM80/worker Month July August September Table 3 Customer demand October November December Table 4 Other information Demand 400 500 550 700 800 700 Current workforce Labour hour unit Workdays/month Beginning inventory What will each if the two following strategies cost? 8 people 4 hours 20 days 150 units a) Vary workforce so that production meets demand. Current worker is 8 people in June. b) Vary overtime and subcontracting. Maximum overtime per month is 300 units and subcontracting 100 units..