High Flying Copters manufactures two types of toy remote control helicopters, small and large. The following per unit data are available: Small Copter Large Copter Sales price $100 $150 Variable costs $55 $85 Machine hours required per copter .5 1.2 Total fixed costs are $450,000 and the company has a machine hour capacity of 30,000 hours per year. What is the contribution margin per machine hour for the small helicopters? $65 $45 $90 $55