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: During August, LLL had the following actual results: Required: Compute LI. L'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)