Answer:
a) standard direct labor hours per brake repair = hour spent repairing the brakes + setup time + cleanup time = 1 + (1 x 20%) + (1 x 30%) = 1.5 hours per brake repair
b) standard direct labor hourly rate = hourly wage rate + payroll taxes + fringe benefits = $12 + ($12 x 10%) + ($12 x 25%) = $16.20
c) standard direct labor cost per brake repair = 1.5 x $16.20 = $24.30