!!Please show explanation and SOLVE CORRECTLY & COMPLETELY!! THANK YOU.

The following standards for variable overhead have been established for a company that makes only one product: Standard hours per unit of output Standard variable overhead rate 4.8 hours $15.00 per hour The following data pertain to operations for the last month: 8,500 hours Actual hours Actual total variable overhead cost Actual output $125,030 1,760 units Required: a. What is the variable overhead rate variance for the month? (Input the amount as a positive value Leave no cells blank be certain to enter "O" wherever required. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance.) ariable overhead rate variance b. What is the variable overhead efficiency variance for the month? (Input the amount as a positive value. Leave no cells blank - be certain to enter "o" wherever required. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance.) Variable overhead efficiency variance