Answer with an Excel file attached including all formulas/ calculations.

During the next 4 months the SureStep Company is forecasted the following demands for pairs of shoes: At the beginning of month 1, 500 pairs of shoes are on hand (already produced previously and not sold), and SureStep has 100 workers. A worker is paid E 1500 per month. Each worker can work up to 160 hours a month before he or she receives overtime. A worker may be forced to work up to 20 hours of overtime per month and is paid E 13 per hour for overtime labor. It takes 4 hours of labor and E15 of raw material to produce a pair of shoes. At the beginning of each month, workers can be hired or fired. Each hired worker costs E 1600, and each fired worker costs E 2000. At the end of each month, a holding cost of E3 per pair of shoes left in inventory is incurred. Production in a given month can be used to meet that same month's demand. Back ordering is allowed and comes at the cost of E5 per pair of shoes due to administrative costs. Draw up three possible aggregate plans (one level plan, one chase plan with overtime, one chase plan without using overtime), and give your advice to SureStep's operations manager which one to follow and why