Fussner Medical Clinic measures its activity in terms of patient-visits. Last month, the budgeted level of activity was 1,610 patient-visits and the actual level of activity was 1,670 patient-visits. The cost formula for administrative expenses is $3.30 per patient-visit plus $17,900 per month. The actual administrative expense was $24,600. In the clinic's flexible budget performance report for last month, the spending variance for administrative expenses?