Acme Company's production budget for August is 19,000 units and includes the following component unit costs: direct materials, $8.00; direct labor, $11.60; variable overhead, $5.60. Budgeted fixed overhead is $47,000. Actual production in August was 20,445 units. Actual unit component costs incurred during August include direct materials, $9.80; direct labor, $10.00; variable 'overhead, $6.40. Actual fixed overhead was $50,000. The standard direct labor cost per unit consists of 0.5 hour of labor time at $23.2 per hour. During August, $204,450 of actual labor cost was incurred for 8,700 direct labor hours. Required: Calculate the labor rate variance and labor efficiency variance for August. Note: Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance)