Exercise 21-16 Computation and interpretation of labor variances LO P2 After evaluating Null Company's manufacturing process, management decides to establish standards of 3 hours of direct labor per unit of product and $15.60 per hour for the labor rate. During October, the company uses 18,000 hours of direct labor ata $284,400 total cost to produce 6,200 units of product. In November, the company uses 22.600 hours of direct laborat a $359,340 total cost to produce 6,600 units of product. AH = Actual Hours SH = Standard Hours AR = Actual Rate SR Standard Rate (1) Compute the direct labor rate variance, the direct labor efficiency variance, and the total direct labor cost variance for each of these two months. Classify each variance as favorable or unfavorable. October Actual Cost Standard Cost November Actual Cost Standard Cost