The following is monthly budgeted cost and activity Information for two activities in the purchasing department of X Company: Activity Supplier relations Invoicing Variable Fixed Cost Costs Costs Driver 260 $7,020 $15,200 suppliers 750 $10,500 $28,700 invoices In November, actual costs and activity were as follows: Total Driver Activity Costs Amount Supplier relations $23,897 314 suppliers Invoicing $39,207 735 invoices What was the flexible budget variance for the supplier relations activity for November (assume that favorable variances are positive numbers and unfavorable variances are negative numbers)