The master budget of Sheffield Corp, shows that the planned activity level for next year is expected to be 50000 machine hours. At this level of activity, the following manufacturing overhead costs are expected: Indirect labor $780000 Machine supplies 260000 Indirect materials 240000 Depreciation on factory building 210000 Total manufacturing overhead $1490000 A flexible budget for a level of activity of 60000 machine hours would show total manufacturing overhead costs of O $1578000. O $1746000. O $1788000 O $1490000. 133 M 11/5/2