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 $5,060 $11,400 Fixed Costs $16,300 $24,700 Cost Driver 220 suppliers 760 invoices In November, actual costs and activity were as follows: Total Costs Activity Supplier relations Invoicing $22,236 $34,557 Driver Amount 275 suppliers 715 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)? O A: $-23,832||OB: $-23,157| OC: $-9,857|| OD: $0 OE: $868|| OF: $1,543