Lamp Light Limited (UL) manufactures lampshades. It applies variable overhead on the basis of direct labor hours. Information from LLL's standard cost card follows: Standard Standard Standard Quantity Rate Unit Cort $0.00 50.48 Variable manufacturing overhead During August, LLL had the following actual results: Units produced and sold Actual variable overhead Actual direct labor hours 25.000 $9.490 16,000 Required: Compute Llu's variable overhead rate variance, variable overhead efficiency variance, and over or underappiled 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 (... zero variance).) Variable overhead risto variance Varble overhead efficiency variance Variatie verhad spending van