Roye Kennel uses tenant-days as its measure of activity; an animal housed in the kennel for one day is counted as one tenant-day. During September, Kennel budgeted for 5,100 tenant-days, but its actual level of activity was 5,140 tenant-days. Kennel has provided the following data concerning the formulas used in its budgeting and its actual results for September:

Data used in budgeting:

	Fixed element per month	Variable element pertenant-day
Revenue		$35.60
Wages and salaries	$2,300	$9.00
Food and supplies	1,500	15.50
Facility expenses	7,900	4.50
Administrative expenses	6,400	0.30
Total expenses	$18,100	$29.30

Actual results for September:

Revenue	$170,525
Wages and salaries	$28,700
Food and supplies	$80,870
Facility expenses	$31,540
Administrative expenses	$7,110

The spending variance for facility expenses in September would be closest to:

$690 U$510 U$510 F$690 F