Colina Production Company uses a standard costing system. The following information pertains to the current year. Direct labor hours is the driver used to assign overhead costs to products.

Actual production	5,500 units
Actual factory overhead costs ($16,500 is fixed)	$40,125
Actual direct labor costs (11,250 hours)	$131,625
Standard direct labor for 5,500 units:
Standard hours allowed	11,000 hours
Labor rate	$12.00

The factory overhead rate is based on an activity level of 10,000 direct labor hours. Standard cost data for 5,000 units is as follows:

Variable factory overhead	$22,500
Fixed factory overhead	13,500
Total factory overhead	$36,000

What is the fixed overhead volume variance for Colina Production Company?

a.$3,600 (F)

b.$1,350 (U)

c.$4,125 (U)

d.$1,350 (F)