Lamp Light Limited (LLL) manufactures lampshades. It applies variable overhead on the basis of direct laboc hours, Information from LLL's standard cost card follows: During August, LLL had the following actual results: Required: Compute LLL's variable overhead rate variance, variable overtheod 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).)