The following labor standards have been established for a particular product: Standard labor-hours per unit of output Standard labor rate $ 8.1 hours 14.40 per hour The following data pertain to operations concerning the product for the last month: Actual hours worked Actual total labor cost Actual output $ 8,700 hours 129,195 1,000 units 2) What is the labor efficiency variance for the month? A) $8,640 U B) $8,910 U C) $12,555 U D) $12,555 F 3) What is the labor rate variance for the month? A) $3,915 F B) $3,915 U C) $450 U D) $450 F