Question: (11 pts) A regional manager is trying to determine the number of salespeople to assign to three areas: Upper, Middle and Lower. There are a total of 110 people that need to be assigned and each area needs at least 15 salespeople. The average annual sales voluMeand costs for each salesperson in each area is given in the following table:

The company has budgeted $800,000 for expenses. The manager wants to know how many salespeople to allocate to each region to maximize total annual sales volume. Formulate an integer programming model for this problem and solve it by using the computer.