Sheridan Company's standard labor cost of producing one unit of Product DD is 3.60 hours at the rate of $13.10 per hour. During August, 40,600 hours of labor are incurred at a cost of $13.25 per hour to produce 11,200 units of Product DD. (a) Compute the total labor variance. Total labor variance $ (b) Compute the labor price and quantity variances. (c) Compute the labor price and quantity variances, assuming the standard is 3.9 hours of direct labor at $13.35 per hour. Labor quantity variance