The following labor standards have been established for a particular product:
Standard labor hours per unit of output 8.3 hours
Standard labor rate $12.10 per hour
The following data pertain to operations concerning the product for the last month:
Actual hours worked 6,100 hours
Actual total labor cost $71,370
Actual output 900 units
What is the labor efficiency variance for the month?
a. $19,017 F
b. $19,017 U
c. $16,029 F
d. $16,577 F