please share formula

A company sells two products with information as follows: Sales price per unit Variable cost per unit $11.00 $20.00 $10.00 $12.00 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 3,000 machine hours available per month. The company can sell up to 17,000 units of product A per month and up to 3,000 units of product B for the month. What is the maximum amount of contribution margin that the company could earn in a month given the stated constraints? OA. $6,000 OB. $30,000 OC. $24,000 O D. $17,000