Speyer Medical Clinic measures its activity in terms of patient visits. Last month, the budgeted level of activity was 160 patent visits and the actual level of activity was 150 patient-visits The cost formula for administrative expenses is $4.00 per patient-visit plus $22,000 per month. The actual administrative expense was $22.300 in the clinic's flexible budget performance report for last month, the spending variance for administrative expenses was Multiple Choice 14340F O $1220F $4300F 540F