Complete Stop Driving School charges $1,800 per student to prepare and administer written and driving tests. Variable costs of $1,080 per student include trainers' wages, study materials, and gasoline. Annual fixed costs of $568,800 include the training facility and fleet of cars. Read the requirements. Requirement 1. For each of the following independent situations, calculate the contribution margin per unit and the breakeven point in units: Begin by showing the formula for contribution margin per unit and then enter the amounts to calculate the contribution margin per unit for each situation. (Abbreviation used: CM = contribution margin.) CM per unit