Kirnon Clinic uses client-visits as its measure of activity. During July, the clinic budgeted for 3,500 client-visits, but its actual level of activity was 3,410 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		-		$	39.60
Personnel expenses	$	35,600		$	10.80
Medical supplies		1,600			7.60
Occupancy expenses		8,600			1.60
Administrative expenses		5,600			0.70
Total expenses	$	51,400		$	20.70

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