The following labor standards have been establed 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 What is the labor rate variance for the month? Multiple Choice $3,915 U $3,915 F 8,700 hours $ 129,195 1,000 units