PA1.) A company sells small motors as a component part to automobiles. The Model 101 motor sells for $850 and has per-unit variable costs of $400 associated with its production. The company has fixed expenses of $90,000 per month. In August, the company sold 425 of the Model 101 motors.

A. Calculate the contribution margin per unit for the Model 101. B. Calculate the contribution margin ratio of the Model 101.