The Center Company produces three products with the following costs and selling prices:

Product Name Round Square Triangle

Selling Price/Unit $24 $26 $20

Variable Cost/unit $10 $10 $12

Machine Hours/unit 2 4 4

Center has a limit of 14,600 machine hours available per month. The company has a monthly fixed cost of $30,000. The demand for each of the products is 2,500 units per month. The company's goal is to mazimize the profitability.

Suppose the company can rent a machine that will provide an additional 800 machine hours per month. What is the maximum monthly rent the company would be willing to pay for this machine?

a. $2,000

b. $4,200

c. $2,400

d. $1,200

e. $2,800