CH = Cost of hiring one worker = $500
CF= Cost of firing one worker = $1,000
CI = Cost of holding one unit of inventory for one month = $80
K = Number of aggregate units produced by one worker in one day.
22 days with 76 workers, 245 units are produced.
245/22 = 11.364 units per day.
11.1364/76 = 0.14635 unit in one day.