Monard Clinic uses client$-$visits as its measure of activity. During January, the clinic budgeted for $3,700$ client$-$visits, but its actual level of activity was $3,710$ client$-$visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for January:

Data used in budgeting:

Actual results for January:

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

$$2,256$ U

$$2,256$ F

$$66$ F

$$66$ U