DE22-20 Consider the Grand Canyon Railway example from the chapter opening story. Suppose Grand Canyon decides to offer two classes of service: Coach class and Chiel class. Assume Grand Canyon incurs $250,000 of fixed expenses per month and that it has the fol- lowing ticket prices and variable expenses: Sale price per ticket. Variable expense per passenger..... Coach Chief Class Class $55.00 15.00 $124.00 24.00 If Grand Canyon Railway expects to sell five tickets in Coach class for every three tickets in Chief class, compute the weighted-average contribution margin per unit (round-trip ticket).