A$.$ A package sorting center uses mostly part$-$time employees requirements $($expressed as the number of part$-$time employees working the

The relevant costs are:

Wages $=$$$\frac{2500}{?}$ month$/$worker

Hiring cost $=$$$\frac{500}{?}$ worker

Layoff cost $=$$$\frac{250}{?}$ worker

Overtime cost $=150\%$ of regular$-$time rate

The current workforce level is $55,$ and overtime cannot exceed $25\%$ of regular$-$time capacity.