please explain step by step how ykh got each box.

please write out formula for each box so i know where you are getting the answersumbers from. i already filled out a but im not sure they are right or not. thank you.

Plan production for a four-month period: February through May. For February and March, you should produce to exact demand forecast. For April and May, you should use overtime and inventory with a stable workforce, stable means that the number of workers needed for March will be held constant through May. However, government constraints put a maximum of 5,000 hours of overtime labor per month in April and May (zero overtime in February and March). If demand exceeds supply, then backorders occur. There are 100 workers on January 31. You are given the following demand forecast: February, 80,000; March, 64,000; April, 100,000; May, 40,000. Productivity is four units per worker hour, eight hours per day, 20 days per month. Assume zero inventory on February 1. Costs are hiring. $50 per new worker; layoff, $70 per worker laid off; inventory holding, $10 per unit-month; straight-time labor, $10 per hour, overtime, $15 per hour, backorder, $20 per unit. Develop a production plan and calculate the total cost of this plan. Note: Assume any layoffs occur at beginning of next month. (Leave no cells blank - be certain to enter "0" wherever required. Negative values should be indicated by a minus sign. Round your answers to the nearest whole number.) May February 80,000 March 64,000 April 100,000 40,000 80000 20000 64000 64000 64000 Forecast Beginning inventory Production required Production hours required Regular workforce Regular production Overtime hours Overtime production Total production Ending inventory Ending backorders Workers hired Workers laid off February March April S Straight time Overtime Inventory 64000 64000 Regular production Overtime hours Overtime production Total production Ending inventory Ending backorders Workers hired Workers laid off February March April May Straight time Overtime Inventory Backorder Hiring Layoff Total Total cost