The following labor standards have been established for a particular product: Standard labor-hours per unit of output Standard labor rate 8.8 hours $12.60 per hour The following data pertain to operations concerning the product for the last month: Actual hours worked Actual total labor cost Actual output 6,600 hours $80,520 950 units What is the labor efficiency variance for the month? Multiple Choice O $21.472 F O $22.176 F $24.816 F $24.816 U