forecast jan=1800, feb=1500, mar=1100, apr=900, may=1100, jun=1600//// #of work days jan=22, feb= 19, mar=21, apr=21, may=22 and jun=20///// material 100.00/uniy inventory holding cost=1.50/unit/month , hiring and training cost=200.00/worker, layoff cost= 250.00/worker, regular labor cost=4.00/hour, overtime labor cost= 6.00/hour and undertimme labor cost=4.00/hour use the chase strategy to formulate the aggregate production plan?