The following is monthly budgeted cost and activity information for two activities in the purchasing department of X Company: Activity Supplier relations Invoicing Variable Costs $9,500 $11,700 Fixed Costs $16,900 $26,300 Cost Driver 380 suppliers 780 invoices In November, actual costs and activity were as follows: Activity Supplier relations Invoicing Total Costs $28,555 $38,115 Driver Amount 430 suppliers 806 invoices What was the flexible budget variance for the invoicing activity for November (assume that favorable variances are positive numbers and unfavorable variances are negative numbers)? A: $-26,415 B: $-26,025 C: $-11,815 D: $-115 E: $0|| OF: $275