Kirnon Clinic uses client-visits as its measure of activity. During July, the clinic budgeted for 3,350 client-visits, but its actual level of activity was 3,260 client-visits. The clinic has provided the following data concerning the formulas to be used in its budgeting: Fixed element per month Revenue Personnel expenses Medical supplies Occupancy expenses Administrative expenses Total expenses $ 35,300 1,300 8,300 5,300 $ 50,200 Variable element per client-visit $ 39.30 $ 10.50 7.30 1.30 0.40 $ 19.50 The activity variance for personnel expenses in July would be closest to: Multiple Choice $945 F $3,385 U O $3,385 F O $945 U