ExpertNet 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 $6,000 per month. ExpertNet's static budget predicted production and sales of 100 connectors in August, but the company actually produced and sold only 78 connectors at a total cost of $28,000. ExpertNet's flexible budget variance for total costs is? Please show work.