The seven-month demand for product X is as follows: 500; 6,000: 2.000: 1,500: 4.000: 5.500; and 6.500. You planned to use a level production rate of 4.000 unit per month. a. Determine the inventory level per month. (10 pts.) b. If currently. the company has 18 workers, determine if you will hire or fire workeris. The labor standard is 0.64 hours, and the regular hours are 160. (20 pts.) c Compute the cost of the production plan above using the following information: material=P30.00; labor=P9.60; overtime P14.40: hiring-P500.00: firing=P750: and holding=P5.00/unit. (10 pts.) d. You changed your strategy: instead of level. you opted to use chase, determine the number of worker/s needed per month. (20 pts.) e. Compute the cost of the production plan of letter d. (10 pts.)