Variable manufacturing overhead Standard Standard Standard Quantity Rate Unit Cost 0.6 $0.80 $0.48 During August, LLL had the following actual results: Units produced and sold 24,300 Actual variable overhead Actual direct labor hours Required: $ 9,420 15,300 Compute LLL's variable overhead rate variance, variable overhead 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 (i.e., zero variance).) Variable Overhead Rate Variance $ 2,964 F Variable Overhead Efficiency Variance $ (672) U Variable Overhead Spending Variance S 2,292 F