Tennies Clinic uses client-visits as its measure of activity. During November, the clinic budgeted for 3,950 client-visits, but its actual level of activity was 3,940 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for November: Data used in budgeting: Fixed element per month Variable element per client-visit Revenue $ 0 $ 36.70 Personnel expenses $ 30,800 $ 11.70 Medical supplies 1,850 7.10 Occupancy expenses 8,900 3.20 Administrative expenses 7,200 0.50 Total expenses $ 48,750 $ 22.50 Actual results for November: Revenue $ 144,795 Personnel expenses $ 76,861 Medical supplies $ 30,653 Occupancy expenses $ 21,015 Administrative expenses $ 8,936 The activity variance for personnel expenses in November would be closest to: