Lamp Light Limited (LL) manufactures tampshades. It applies variable overhead on the basis of direct labor hours Information from LLL's standard cost card follows: Standard Standard Standard Quantity Unit Cont 0.6 $0.00 $0. Variable manufacturing overhead During August, tut had the following actual results: units produced and sold Actual variable overhead Actual direct labor hours $9,520 16,300 Required: Compute Lt's variable overhead rate variance, valoble overhead efficiency variatice, and over or under applied warlotte overheid (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable. "U" for unfavorable, and "None" for no effect (.o., zero variance)) Variable Overhead Rate Variance Variable Overhead Efficiency Varance Variable Overhead Spending Vrance