Bartosiewicz Clinic uses client-visits as its measure of activity. During January, the clinic budgeted for 4,700 client-visits, but its actual level of activity was 4,680 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for January:

Data used in budgeting:

	Fixed element per month			Variable element per client-visit
Revenue		-		$	36.70
Personnel expenses	$	28,700		$	12.70
Medical supplies		1,600			6.70
Occupancy expenses		10,600			1.00
Administrative expenses		7,700			0.30
Total expenses	$	48,600		$	20.70

Actual results for January:

Revenue	$	131,000
Personnel expenses	$	70,030
Medical supplies	$	21,014
Occupancy expenses	$	13,200
Administrative expenses	$	7,450

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