Concord Company's standard labor cost of producing one unit of Product DD is 4 hours at the rate of $14.80 per hour. During August, 51,600 hours of labor are incurred at a cost of $14.95 per hour to produce 12,800 units of Product DD. (a) Compute the total labor variance. Total labor variance $ (b) Compute the labor price and quantity variances. Labor price variance $ Labor quantity variance $ (c) Compute the labor price and quantity variances, assuming the standard is 4.1 hours of direct labor at $15.05 per hour. Labor price variance $ Labor quantity variance $