Tennies Clinic uses client-visits as its measure of activity. During November, the clinic budgeted for 3,500 client-visits, but its actual level of activity was 3,490 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 - $ 35.80 Personnel expenses $ 29,900 $ 10.80 Medical supplies 1,400 6.20 Occupancy expenses 8,000 2.30 Administrative expenses 6,300 0.40 Total expenses $ 45,600 $ 19.70 Actual results for November: Revenue $ 125,117 Personnel expenses $ 67,564 Medical supplies $ 23,840 Occupancy expenses $ 15,543 Administrative expenses $ 7,479 The activity variance for personnel expenses in November would be closest to: