The following data is available for Wheels 'N Spokes Repair Shop for 2019: Repair technicians' wages Fringe benefits Overhead Total $360,000 80,000 60,000 $500,000 The desired profit margin is $50 per labor hour. The material loading charge is 40% of invoice cost. It is estimated that 10,000 labor hours will be worked in 2019. Wheels 'N Spokes' labor charge per hour in 2019 would be $70 $90 None of the above O $40 O $50