Lamp Light Limited (LLL) manufactures lampshades. It applies variable overhead on the basis of direct labor hours. Information from LLL's standard cost card follows: Variable manufacturing overhead During August, LLL had the following actual results: Standard Quantity 0.6 Standard Rate $0.80 Standard Unit Cost $0.48 Units produced and sold Actual variable overhead Actual direct labor hours Required: 24,600 $ 9,450 15,600 Compute LLL's variable overhead rate variance, variable overhead efficiency variance, and over- or underapplied variable overhead. Note: Do not round intermediate calculations. 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 Rate Variance Variable Overhead Efficiency Variance Variable Overhead Spending Variance