A company sells two products with information as follows: Sales price per unit Variable cost per unit A $11 $10 B $26 $10 The products are machine made. Four units of product A can be made with one machine hour and two units of product B can be made with one machine hour. The company has a maximum of 4,000 machine hours available per month. The company can sell up to 18,000 units of product A per month, and up to 3,000 units of product B for the month. What is the optimum product mix to maximize the company's operating income? O A. zero units of A and 3,000 units of B O B. 1,500 units of A and 58,000 units of B O C. 10,000 units of A and 3,000 units of B OD. 10,000 units of A and zero units of B