ExpertNet Systems is a start-up company that makes connectors for high-speed Internet connections. The company has budgeted variable costs of $130 for each connector and fixed costs of $9,500 per month. ExpertNet's static budget predicted production and sales of 100 connectors in August, but the company actually produced and sold only 73 connectors at a total cost of $24,000. ExpertNet's flexible budget variance for total costs is OA. $3,510 F OB. $5,010 U Oc. $5,010 F OD. $3,510 U