help me please

Speyer Medical Clinic measures its activity in terms of patient-visits. Last month, the budgeted level of activity was 1,090 patient-visits and the actual level of activity was 1,080 patient-visits. The cost formula for administrative expenses is $3.30 per patient-visit plus $18,500 per month. The actual administrative expense was $20,200. Last month the clinic's spending variance for administrative expenses was: Multiple Choice $1,864F $670F $33F $1,897F