c. Variable overhead rate and efficiency variances. (Input all amounts as positive values. 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 Variable overhead efficiency variance 2. How much of the $0.34 excess unit cost is traceable to each of the variances computed in (1) above (Input all amounts as positive values. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect i.e., zero variance). Round your answers to 2 decimal places.) Materials Price variance Quantity variance 0.00 Labor: Rate variance Efficiency variance 0.00 Variable overhead Rate variance Efficiency variance 0.00 Excess of actual over standard cost per unit 0.00 3. How much of the $0.34 excess unit cost is traceable to apparent inefficient use of labor time? (Input all values as positive amounts. Indicate the effect of each variance by selecting "F" for favorable "U" for unfavorable, and "None" for no effect (i.e., zero variance). Do not round intermediate calculations. Round your final answers to 2 decimal places.) Excess of actual over standard cost per unit Less portion attributable to labor inefficiency: Labor efficiency variance Variable overhead efficiency variance Portion due to other variances 0.00 0.00 F