For SDX Enterprises, the following information applies: Sales price per unit = $200 Variable cost per unit = $100 Average production = 1,500 units per month Total fixed costs = $60,000 per month How many units per month must SDX Enterprises sell in order to make a $100,000 profit? Select one: O a. 1,600 O b. 600 C. 800 O d. 1,400 O e. 1,000 of 1,800