Current Attempt in Progress The following data is available for Vaughn Repair Shop for 2022: The desired profit margin is $30 per labor hour. The material loading charge is 40% of invoice cost. It is estimated that 5000 labor hours will be worked in 2022. In March 2022, Vaughn repairs a bicycle that takes two hours to repair and uses parts of $340. The bill for this repair would be $648.00. $678.00. $784.00. $741.20