Cooper Hospital 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 1,040 patient-visits. The cost formula for administrative expenses is $4.00 per patient-visit plus $17,000 per month. The actual administrative expense was $21,000. In the clinic's flexible budget performance report for last month, the spending variance for administrative expenses was: Group of answer choices $160 F $240 U $150 F $240 F