Lamp Light Limited (LLL) manufactures tampshades. It applles 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 50.80 $0.48 During August, LLL had the following actual results Units produced and sold Actual variable overhead Actual direct labor hours 26,300 $9,590 17,000 Required: Compute Lles variable overhead rate variance, variable overhead efficiency variance, and over- or underapplied variable overhead (Do not round Intermediate calculations. Indicate the effect of each varlance by selecting "F" for favorable, "U" for unfavorable. and "None" for no effect (1.e., zero variance).) Vanable Overhead Rate Variance Variable Overhead Efficiency Variance Variable Overhead Spending Variance