Hassock Corp. produces woven wall hangings. It takes 2 hours of direct labor to produce a single wall hanging. Hassock's standard labor cost is $17 per hour. During August, Hassock produced 13,900 units and used 28,160 hours of direct labor at a total cost of $476,020. What is Hassock's labor efficiency variance for August? $6,120 favorable. $3,420 unfavorable. $8,820 unfavorable. $5,400 favorable. $6,120 unfavorable