? Which of the following would produce no change in the contribution margin per unit .a. None of the given of answers O .b. A 14% increase in variable costo A 2396 increase in the number of units sold O .d. A 15% decrease in selling price o .e. A 7% increase in selling price, o XYZ company has a selling price of $40, and variable costs of $26 per unit. When 15,000 units are sold. ?profits equaled $70,000. How many units must be sold to break-even a. 8.500 b. 10.000 C. 8.000 d. 7.000 e. None of the given answers 7