I (25 points). ABCCo. is to plan its workforce and production levels for next year. Forecast demands for the next 4 quarters are 1160,960,1150,1380 units. Ending inventory of last year is expected to be 60 , and the ABC would like to have a minimum of 50 units in inventory at the end of next year. The cost of holding one unit in inventory for one quarter is $190. There are currently 200 workers. The cost of hiring one worker is $700, and the cost of firing one worker is $1500. In the past, the plant manager observed that over 60 workings days and with the workforce level constant at 200 workers, ABC produced 1200 units. The number of working days for the next 4 quarters are respectively 61,62,65, and 58. Assume that ABC plans to adopt a level strategy (constant workforce plan) for next year. (b) (7pts) Find the inventory level at the end of next year. (A) 52 (B) 55 (C) 59 (D) 64 (c) (8 pts) Compute the total cost (including hiring/firing cost and inventory cost) under the constant workforce plan for next year. (A) $142600 (B) $153350 (C) 5164420 (D) $175500