Kimon 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 Variable element per month per client-visit $ 40.20 Revenue $ $ Personnel expenses Medical supplies Occupancy expenses Administrative expenses Total expenses 36,200 2,200 9,209 6,200 53,800 11.40 8.20 2.20 0.40 22.20 $ $ The activity variance for net operating income in July would be closest to