Lewis Company's standard labor cost of producing one unit of Product DD is 3.10 hours at the rate of $12.70 per hour. During August, 42,200 hours of labor are incurred at a cost of $12.80 per hour to produce 13,500 units of Product DD. (a) Compute the total labor variance. Total labor variance (b) Compute the sabor price and quantity yariances Labor price variance Labor quanthy variance (B)