Paradiso Medical Clinic measures its activity in terms of patient-visits. Last month, the budgeted level of activity was 1,060 patient-visits and the actual level of activity was 1,050 patient-visits. The cost formula for administrative expenses is $3.00 per patient- visit plus $17,000 per month. The actual administrative expense was $19,300. In the clinic's flexible budget performance report for last month, the spending variance for administrative expenses was: O $220 U 30 F O $880 F O $850F