Leven Clinic uses client-visits as its measure of activity. During September, the clinic budgeted for 3,000 client-visits, but its actual level of activity was 3,050 client-visits. The clinic has provided the following data concerning the formulas to be used in its budgeting for September:

	Fixed element per month	Variable element per client-visit
Revenue	$ 0	$ 31.00
Personnel expenses	$ 23,900	$ 10.70
Medical supplies	1,400	3.90
Occupancy expenses	5,700	1.10
Administrative expenses	5,100	0.10
Total expenses	$ 36,100	$ 15.80

The net operating income in the planning budget for September would be closest to: