How do I show total manufacturing overhead costs by calculating a flexible budget for a level of activity of 60,000 machine hours if given the following information: The master budgt of Windy Co. shows that the planned activity level for next year is expected to be 50,000 machine hours. At this level of activty, the following manufacturing overhead costs are expected: Indirect labor- $720,000, Machine supplies- 180,000, indirect materials-210,000, depreciation on factory building- 150,000, total manufacturing overhead is $1,260,000.