Gamma Company uses normal costing. It allocates manufacturing overhead costs using a budgeted rate per machine-hour. The following data are available for 2015: Budgeted manufacturing overhead $5,000,000 Budgeted machine-hours 200,000 Actual manufacturing overhead costs $5,030,000 Actual machine-hours 180,000 Required: 1. Calculate the budgeted manufacturing overhead rate 2. Calculate the manufacturing overhead allocated during 2015, 3. Calculate the amount of under- or over-allocated manufacturing overhead. Why do Gamma's managers need to calculate this amount