Wilson manufactures two products: Shuttle Rackets and Tennis Rackets. The following data are available: Shuttle Rackets Tennis Rackets Sales price $85 $225 Variable costs $30 $150 The company can manufacture four Shuttle Rackets per machine hour and three Tennis Rackets per machine hour. The company's production capacity is 1.200 machine hours per month What is the contribution margin per machine hour for Shuttle Rackets? $55 $350 $285 $220