Major Medical, producer of portable EKG units, is developing a 4 month aggregate plan. Month 1 Month 2 Month 3 Month 4 Regular Time Capacity 235 255 290 300 OT Capacity 20 24 26 24 Subcontract Capacity 12 15 17 17 DEMAND 255 294 321 301 The cost of producing each unit is $985 on regular time, $1,310 on overtime, and $1,500 on a subcontract. Inventory carrying cost is $100 per month. There is no beginning inventory, and no ending inventory requirement. Backorders are permitted, but cost $400 per month per unit. Find the optimal solution. What is the optimal cost? How much excess capacity is there? In this example, if backlogging were instead not allowed the optimal solution cost would . In this example, if backlogging costs were $100 per unit per month instead of $400 the optimal solution cost would