Wales Kennel uses tenant-days as its measure of activity; an animal housed in the kennel for one day is counted as one tenant-day. During February, the kennel budgeted for 2,700 tenant-days, but its actual level of activity was 2,730 tenant-days. The kennel has provided the following data concerning the formulas to be used in its budgeting:

	Fixed element per month			Variable element per tenant-day
Revenue				$	31.70
Wages and salaries	$	2,100		$	7.70
Food and supplies		900			11.20
Facility expenses		8,500			2.70
Administrative expenses		6,700			0.10
Total expenses	$	18,200		$	21.70

The administrative expenses in the planning budget for February would be closest to:

a. $6,639

b. $6,713

c. $6,970

d. $6,973