You’ve been hired as an economic consultant to a price-taking firm that produces shirts. The firm already has a shirt factory, so it is operating in the short run. The price of shirts is $5, the hourly wage is $12, and each shirt requires $1 worth of material. At the current level of output (20 workers and 70 shirts per hour), the firm is losing money: Its total cost exceeds it total revenue. The firm has experimented with different numbers of workers and discovered that 21 workers would produce 72 shirts; 15 workers would produce 60 shirts; and 16 workers would produce 63 shirts. You job as a consultant is to tell the firm which of these four options to take; and explain and show your calculations as to why you selected an option.