An urgent care clinic has established a flexible budget based on patient visits. In October, the budgeted level of activity was $2,000$ patient visits and the actual level of activity was $2,100$ patient visits. The cost formula for administrative expenses is $$5$ per patient visit plus $$30,000$ fixed cost per month. The actual administrative expense for October was $$42,000.$ What was the spending variance for administrative expenses for October? Show your calculations.