Company policy limits part-time labor to 25% of weekly labor requirements. Modify the model as necessary, and then use Solver to minimize the company’s weekly labor costs.

In the employee scheduling example, suppose that each full-time employee works eight hours per day. Thus, Monday’s requirement of 17 employees can be viewed as a requirement of 8(17) =136 hours. The company can meet its daily labor requirements by using both full-time and part-time employees. During each week, a full-time employee works eight hours per day for five consecutive days, and a part-time employee works four hours per day for five consecutive days. A full-time employee costs the company $15 per hour, whereas a part-time employee (with reduced fringe benefits) costs the company only $10 per hour. Company policy limits part-time labor to 25% of weekly labor requirements. Modify the model as necessary, and then use Solver to minimize the company’s weekly labor costs.