The following data is avaliable for Wheels 'N Spokes Repair Shop for 201X: Repair technicians' wages..........................$180,000 Fringe benefits............................................40,000 Overhead...................................................30,000 ..............................................Total........$250,000 The desired profit margin is $20 per labor hour. The material loading charge is 40% of invoice cost. It is estimated that 5,000 labor hours will be worked in 201X. In march 201X, Wheels 'N Spokes repairs a bicycle that takes two hours to repair and uses parts of $120. The bill for this repair would be a $280 b $260 c $308 d $296