Marquardt Corporation uses tenant-days as its measure of activity; an animal housed in the kennel for one day is counted as one tenant-day. During April, the kennel budgeted for 4,080 tenant-days, but its actual level of activity was 3,890 tenant-days. The kennel has provided the following data concerning the formulas used in its budgeting and its actual results for April: Data used in budgeting: Actual results for April: The net operating income in the planning budget for April would be closest to: $10,884 $9,402 $13,605 $107,172