Gandrud Kennel uses tenant-days as its measure of activity; an animal housed in the kennel for one day is counted as one tenant-day. During June, the kennel budgeted for 2,580 tenant-days, but its actual level of activity was 2,600 tenant-days. The kennel has provided the following data concerning the formulas to be used in its budgeting: Fixed element per month Variable element per tenant-day Revenue $37.20 Wages and salaries $3,400 $7.30 Food and supplies 1,200 14.00 Facility expenses 9,600 2.60 Administrative expenses 7,700 0.30 Total expenses $21,900 $24.20 The net operating income in the static planning budget for June would be closest to