Gourley Clinic uses client-visits as its measure of activity. During August, the clinic budgeted for 3,550 client-visits, but its actual level of activity was 3,490 client-visits. The clinic has provided the following data concerning the formulas to be used in its budgeting:

	Fixed element per month	Variable element per client-visit
Revenue		$39.70
Personnel expenses	$35,700	$10.90
Medical supplies	1,700	7.70
Occupancy expenses	8,700	1.70
Administrative expenses	5,700	.80
Total expenses	$51,800	$21.10

The activity variance for personnel expenses in August would be closest to: