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 Standard Standard Standard Quantity Rate Unit Cost 0.6 $0.80 $0.48 During August, LLL had the following actuafresults: Units produced and sold Actual variable overhead Actual direct labor hours 24,000 $ 9,390 15,000 Required: Compute LLL's variable overhead rate variance variable overhead efficiency variance, and over- or underapplied variable overhead. (Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (le, zero variance).) $ Variable Overhead Rate Variance Variable Overhead Efficiency Variance Variable Overhead Spending Variance $ 2.700 3F (480) U 3.180 F $