Kirnon Clinic uses client-visits as its measure of activity. During July, the clinic budgeted for 4,200 client-visits, but its actual level of activity was 4,270 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		-		$	41.00
Personnel expenses	$	37,000		$	12.20
Medical supplies		3,000			9.00
Occupancy expenses		8,200			3.00
Administrative expenses		7,000			0.30
Total expenses	$	55,200		$	24.50

The activity variance for net operating income in July would be closest to: