E9-13 (Algo) Calculating Variable Manufacturing Overhead Variances [LO 9-5] Lamp Light Limited (LLL) manufactures lampshades. It applies variable overhead on the basis of direct labor hours. Information from LLis standard cost card follows: During August, LLL hod the following actual results: Pequired: Compute LLL's variable overhead rate vanance, variable overtiead etficiency 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 unfavorabie, and "None" for no effect (i.e, zero variance)