Fager Clinic uses client-visits as its measure of activity. During February, the clinic budgeted for 2,200 client-visits, but its actual level of activity was 2,250 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for February:

Data used in budgeting:

	Fixed element per month	Variable element per client-visit
Revenue	$ 0	$ 68.20
Personnel expenses	$ 32,300	$ 21.50
Medical supplies	1,200	12.50
Occupancy expenses	9,700	3.40
Administrative expenses	5,000	0.10
Total expenses	$ 48,200	$ 37.50

Actual results for February:

Revenue	$ 156,210
Personnel expenses	$ 80,445
Medical supplies	$ 30,105
Occupancy expenses	$ 16,800
Administrative expenses	$ 5,015

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

a) $845 F

b) $845 U

c) $1,075 U

d) $1,075 F