Tennies Clinic uses client-visits as its measure of activity. During November, the clinic budgeted for 3,600 client-visits, but its actual level of activity was 3,590 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 monthVariable element per client-visitRevenue-$36.00Personnel expenses$30,100$11.00Medical supplies1,5006.40Occupancy expenses8,2002.50Administrative expenses6,5000.20Total expenses$46,300$20.10

Actual results for November:

Revenue$129,420Personnel expenses$69,560Medical supplies$25,284Occupancy expenses$16,689Administrative expenses$6,995

The activity variance for personnel expenses in November would be closest to: