Kirnon Clinic uses client-visits as its measure of activity. During July, 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			0.80
Total expenses	$	51,800		$	21.10

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