13B-13. Can someone show me how to do this problem?

Will rate a thumb up for good response thanks so much (PLEASE CIRCLE OR HIGHLIGHT final answer thx)

The president of Hill Enterprises, Terri Hill, projects the firm's aggregate demand requirements over the next 8 months as follows: January 1,400 May 2,100 February 1,500 June 2,100 March 1,600 July 1,900 April 1,700 August 1,900 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 $100 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 strategy that produces 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 $55 per unit. The cost of laying off workers is $80 per unit. Evaluate this plan. (Enter all responses as whole numbers.) Note: Both hiring and layoff costs are incurred in the month of the change. For example, going from 1,600 in January to 1,400 in February incurs a cost of layoff for 200 units in February. Note: Both hiring and layoff costs are incurred in the month of the change. For example, going from 1,600 in January to 1,400 in February incurs a cost of layoff for 200 units in February. Hire (Units) Layoff (Units) Ending Inventory 200 Stockouts (Units) Period Month 0 December 1 January 2 February 3 March 4 April May Demand 1,600 1,400 1,500 1,600 1,700 2,100 2,100 1,900 1,900 Production 1,600 1,600 1,400 1,500 1,600 1,700 2,100 2,100 1,900 5 6 June 7 July August 8 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.) The total stockout cost = (Enter your response as a whole number.) The total cost, excluding normal time bor costs, is = $ (Enter your response as a whole number.)