Current Attempt in Progress The following data are available for Sandhill Repair Shop for 2022 : The desired profit margin is $14 per labour hour. The material loading charge is 30% of invoice cost. It is estimated that 4000 labour hours will be worked in 2020. In March 2022, Sandhill repairs a bicycle that takes three hours to repair and uses parts of $75. The bill for this repair would be $322.50.$308.50$266.50$364.50