Suppose the regular rate of production is 700 units per period. You are not allowed to produce anything on an overtime basis; further, the subcontractor has gone out of business. You can hire two temporary workers during the periods 3, 4, and 5. Each worker can produce 100 units per period at the regular cost. But it costs $300 to train a worker and check the quality of the product during each of the three periods. (19) The average inventory for the first period is? (20) The average inventory for the fifth period is?? (21) The total cost of over-time production for the all the six periods is? (22) The additional cost associated with the temporary workforce for all the six periods is? (23) The back-order cost for the fifth period is? (24) The total cost of meeting the demand is?