Question 9 (4 points) Ch. 10 - Jiffy Lube has established the following labor standards for an oil change service: Standard labor-hours per unit of output 9.1 hours Standard labor rate $12.90 per hour The following data pertain to operations concerning the oil change service for November Actual hours worked 6,900 hours Actual total labor cost $86,250 Actual output 900 oil changes What is the labor efficiency variance for November? $16,125 F $16,641 F O$19,401 0 $19,401 F