Lancelot Corporation manufactures tennis gear and uses budgeted​ machine-hours to allocate variable manufacturing overhead. The following information relates to the​ company's manufacturing overhead​ data: Budgeted output units ​3,000 units Budgeted​ machine-hours ​15,000 hours Budgeted variable manufacturing overhead costs for​ 3,000 units ​$180,000 Actual output units produced ​3,350 units Actual​ machine-hours used ​14,700 hours Actual variable manufacturing overhead costs ​$250,000 What is the​ flexible-budget variance for variable manufacturing​ overhead?