Dinham 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 March, the kennel budgeted for 4,000 tenant-days, but its actual level of activity was 4,040 tenant-days. The kennel has provided the following data concerning the formulas used in its budgeting and its actual results for March: Data used in budgeting: Revenue Wages and salaries Food and supplies Facility expenses Administrative expenses Total expenses Fixed Variable element element per per month tenant-day 0 $ 34.90 $ 2,900 $ 7.90 1,900 14.40 8,400 3.40 6,900 0.40 $ 20,100 $ 26.10 Actual results for March: Revenue Wages and salaries Food and supplies Facility expenses Administrative expenses $ 131,231 $ 28,590 $ 60,575 $ 21,800 $ 7,099 The overall revenue and spending variance (i.e., the variance for net operating income in the revenue and spending variance column on the flexible budget performance report) for March would be closest to