Kirnon Clinic uses client-visits as its measure of activity. During July, the clinic budgeted for 3,800 client-visits, but its actual level of activity was 3,750 client-visits. The clinic has provided the following data concerning the formulas to be used in its budgeting: Fixed element per monthVariable element per client-visit Revenue - $40.20 Personnel expenses$36,200 $11.40 Medical supplies 2,200 8.20 Occupancy expenses 9,200 2.20 Administrative expenses 6,200 0.40 Total expenses$53,800 $22.20 The activity variance for net operating income in July would be closest to: