The following labor standards have been established for a particular product: Standard labor-hours per unit of output Standard labor rate 10.2 hours $ 14.00 per hour The following data pertain to operations concerning the product for the last month: Actual hours worked Actual total labor cost Actual output What is the labor efficiency variance for the month? (2.5) 1) $19,720 F 2) $19,720 U 3) $16,520 F 4) $16,048 F 8,000 hours $ 108,800 900 units