Direct mersale ( ponds at 50.50 per pound) Direct labor (2 hours at $10 per hour) Variable manufacturing overhead (2 hours at 55 per hour) 10 During November, 8,000 units were produced. The costs associated with November operations were as follows Material purchased (36,000 pounds at 50.60 per pound) $21,600 Material used in production (28,000 pounds) Direct labor (18,400 hours at $9.75 per hour) 179,400 Variable manufacturing overhead incurred 110,400 What is the variable overhead efficiency variance for the product for November? O$ 18,400 Unfavorable. $ 18,400 Unfavorable $ 12,000 Favorable $ 12,000 Unfavorable 4