Bartosiewicz Clinic uses client-visits as its measure of activity. During January, the clinic budgeted for 3,400 client-visits, but its actual level of activity was 3,380 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		-		$	35.40
Personnel expenses	$	27,400		$	11.40
Medical supplies		1,400			5.40
Occupancy expenses		10,400			1.00
Administrative expenses		6,400			0.50
Total expenses	$	45,600		$	18.30

Actual results for January:

Revenue	$	124,690
Personnel expenses	$	72,040
Medical supplies	$	22,708
Occupancy expenses	$	14,640
Administrative expenses	$	8,145

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