I need to know the equations to solve for the table, and excel is fine as long as it explains 'how' such as,

ex: product requirements = (beginning inventory - demand forecast).

Plan production for a four-month period: February through May.

Productivity: four units per worker hour, eight hours per day, 21 days per month.

Assume zero inventory on February 1.

Costs are:

hiring, $51 per new worker;

layoff, $71 per worker laid off;

inventory holding, $10 per unit-month;

regular time labor, $10 per hour;

overtime, $15 per hour;

backorder, $20 per unit.

Plan production for a fourmonth 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, 83,328; March, 67,200; April, 100,080; May, 40,080. Productivity is four units per worker hour, eight hours per day, 21 days per month. Assume zero inventory on February 1. Costs are: hiring, $51 per new worker; layoff, $71 per worker laid off; inventory holding, $10 per unitmonth; regular 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 the cells blank, whenever zero (0) is required. Negative values should be indicated by a minus sign. Round your answers to the nearest whole number.) March April May 100 ,080 Forecast 83 , 328 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