The following is monthly budgeted cost and activity information for two activities in the purchasing department of X Company:

Activity	Variable Costs	Fixed Costs	Cost Driver
Supplier relations	$8,500	$16,500	340 suppliers
Invoicing	$10,320	$24,400	860 invoices

In November, actual costs and activity were as follows:

Activity	Total Costs	Driver Amount
Supplier relations	$24,293	342 suppliers
Invoicing	$35,665	861 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)?

A: $-15,793

B: $-15,743

C: $-7,793

D: $0

E: $707

F: $757