Can someone please answer these so i can check them? Thank you!

Fabian Fabrication machines heavy-duty brake rotors that are used on commercial airliners. Fabian's management developed the following standard costs: andard direct labor hours per rotor tandard overhead rate per direct labor hour 2.40 $11.25 Actual activity for October: Actual overhead costs incurred Actual direct labor hours $%136,800 11,40 4,1 Actual rotors machined 5 What is the variable manufacturing overhead rate variance in October? . What is the variable manufacturing overhead efficiency variance in October