Sheffield Companys standard labor cost of producing one unit of Product DD is 3.9 hours at the rate of $13.2 per hour. During August, 40,800 hours of labor are incurred at a cost of $13.30 per hour to produce 10,300 units of Product DD. Compute the total labor variance. Total labor variance $ Compute the labor price and quantity variances. Labor price variance $ Labor quantity variance $ Compute the labor price and quantity variances, assuming the standard is 4.2 hours of direct labor at $13.50 per hour. Labor price variance $ Labor quantity variance $