ProNet Systems is a start-up company that makes connectors for high-speed Internet connections. The company has budgeted variable costs of $110 for each connector and fixed costs of $5,000 per month. ProNet's static budget predicted production and sales of 100 connectors in August, but the company actually produced and sold only 76 connectors at a total cost of $20,000. ProNet's flexible budget variance for total costs is O A. $6,640 F. B. $2,640 U. O c. $6,640 U. OD. $2.640 F