Vaughn Company's master budget shows that the planned activity level for next year is expected to be 20000 machine hours. At this level of activity, the following manufacturing overhead costs are expected: Indirect labour $45800 Factory supplies 3200 Indirect materials 21800 Depreciation on factory building 14300 Total manufacturing overhead $85100 Indirect labour, factory supplies, and indirect materials are variable costs. If the company operates at 21000 machine hours, how much is allowed on a flexible budget for manufacturing overhead costs? O $89355 O $74340 O $88640 O $85100