Ibsen Clinic uses client-visits as its measure of activity. During December, the clinic budgeted for 3,300 client-visits, but its actual level of activity was 3,340 client-visits. The clinic has provided the following data concerning the formulas used in its budgeting and its actual results for December Data used in budgeting: Fixed Variable Element element per per Month client-visit Revenue $ 40.00 Personnel expenses Medical supplies Occupancy expenses Administrative expenses Total expenses $32,400 1,500 9,100 6,700 $49,700 $13.40 4.80 2.10 0.40 $20.70 Actual results for December Revenue $134,170 Personnel expenses $ 80,776 Medical supplies $ 17,302 Occupancy expenses $ 15,754 Administrative expenses S 8, 296 The net operating income in the flexible budget for December would be closest to Multiple Choice O $12,188 O $13,990 O $14,762 $11,898