A motor-cycle manufacturing company desires a profit of $600,000. The fixed costs are $800,000. The unit selling price of the motor-cycle is $750 and the variable cost per unit is $680. How many units of motor-cycle should the company sell to earn the desired profit? a. 11,429 motor-cycles b. 8,572 motor-cycles c. 20,000 motor-cycles d. 2,857 motor-cycles