The following standards for variable manufacturing overhead have been established for a company that makes only one product:

Standard hours per unit of output	7.4	hours
Standard variable overhead rate	$13.80	per hour

The following data pertain to operations for the last month:

Actual hours	2,775	hours
Actual total variable manufacturing overhead cost	$38,995
Actual output	200	units

What is the variable overhead efficiency variance for the month?

• $18,571 U

• $700 F

• $20,424 F

• $17,871 U