BITCO's sales mix is 3 units of A, 2 units of B, and 1 unit of C. Selling prices for each product are $20, $30, and $40, respectively. Variable costs per unit are $12, $18, and $24, respectively. Fixed costs are $320,000. What is the break-even point in units of A, B, and C? O A 12,000; B 8,000: C 4,000. O A 5,000; B 10,000; C 15,000. A 18,000: B 12,000; C 6,000. O A 15,000; B 10,000; C 5,000. O A4,000; B 8,000; C 12,000