Applet 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 $ per month. Applet's static budget predicted production and sales of 100 connectors in August, but the company actually produced and sold only 72 connectors at a total cost of $18,000. Applet's sales volume variance for total costs is OA. $3,640 U. O B. $3,640 F. OC. $4,140 U. OD. $4,140 F.