Evaluate the following plans D and E. warehouse now constrains the maximum allowable inventory on hand to 400 units or less. If production and/or inventory are adequate, do not produce any units in overtime. Note: Do not produce in overtime if production or inventory are adequate to cover demand. The total cost of hirings is computed as follows: Total hiring cost = Total units hired Cost of hiring additional workers per unit. Total hiring cost =$ ( (Enter your response as a whole number.) The total cost of layoffs is computed as follows: Total layoff cost = Total units laid off Cost of laying off workers per unit. The total cost of layoffs =$ . (Enter your response as a whole number.) Calculate the ending inventory in each month as follows: Ending inventory = Production in this month - Demand in this month + Ending inventory in the prior month. If the ending inventory is negative, it is called a stockout