Mcgahen Medical Clinic measures its activity in terms of patient-visits. Last month, the budgeted level of activity was 1,080 patient-visits and the actual level of activity was 990 patient-visits. The clinic's director budgets for variable overhead costs of $3.30 per patient-visit and fixed overhead costs of $10,600 per month. The actual variable overhead cost last month was $3,380 and the actual fixed overhead cost was $8,780. In the clinic's flexible budget performance report for last month, what would have been the variance for the total overhead cost?