Hoeper Clinic uses client-visits as its measure of activity. During January, the clinic budgeted for 2,600 client-visits, but its actual level of activity was 2,570 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for January:

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

A) $1,416 U

B) $486 F

C) $1,416 F

D) $486 U