Tennies clinic uses client-visits as its measure of activity. during november, the clinic budgeted for 3,700 client-visits, but its actual level of activity was 3,690 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 - $ 36.20 personnel expenses $ 30,300 $ 11.20 medical supplies 1,600 6.60 occupancy expenses 8,400 2.70 administrative expenses 6,700 0.40 total expenses $ 47,000 $ 20.90 actual results for november: revenue $ 133,763 personnel expenses $ 71,596 medical supplies $ 26,768 occupancy expenses $ 17,875 administrative expenses $ 7,951 the activity variance for personnel expenses in november would be closest to: