The Center Company produces three products with following costs and selling prices: Center has a limit of l, 300 machine hours available per month. The company has a monthly fixed costs of $30,000. The demand for each of the products is 250 units per months. The company's goal is to maximize its profitability. Suppose the company can rent a machine that will provide an additional 700 machine hours per month. What is the maximum monthly rent the company would pay for this machine? A. $900 B. $1, 800 C. $1, 400 D. $3, 600 E. None of the above