Duck 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 December, the kennel budgeted for 2,300 tenant-days, but its actual level of activity was 2,320 tenant-days. The kennel has provided the following data concerning the formulas to be used in its budgeting: Fixed Variable Element Element per per Month Tenant-Day - $37.70 Revenue Wages and salaries Food and supplies Facility expenses Administrative expenses Total expenses $ 3,000 800 9,800 7,100 $ 20,700 $ 6.10 13.40 4.70 0.20 $24.40 The net operating income in the planning budget for December would be closest to: (Round your intermediate calculations to 2 decimal places.) Multiple Choice $7,184 $9,890 Oo oo $7.309 $10,156