Her operations manager is considering a new plan, which begins in January with 200 units of inventory on hand Stockout cost of lost sales is $125 per unit Inventory holding cost is $20 per unit per month Ignore any idle-time costs. The plan is called plan A Plan A: Vary the workforce level to execute a "chase" strategy by producing the quantity demanded in the prior month. The December demand and rate of production are both 1,600 units per month. The cost of hiring additional workers is $50 per unit. The cost of laying off workers is $80 per unit. Evaluate this plan. (Enter all responses as whole numbers.) The total cost of hirings =: (Enter your response as a whole number.) The total cost of layoffs = (Enter your response as a whole number.) The total inventory carrying cost = (Enter your response as a whole number.)