Final answer:
The question deals with managerial accounting principles in Business studies, specifically the calculation and application of a plantwide predetermined overhead rate and its role in job costing.
Step-by-step explanation:
The student's question pertains to the calculation of the plantwide predetermined overhead rate and its application in job costing within a company. This falls under the category of managerial accounting, a subset of Business studies. The information provided in the question suggests that Mickley Company uses a predetermined overhead rate based on direct labor-hours to allocate overhead costs to jobs. In addition to direct labor costs which are paid at a specific wage rate, the company needs to assign indirect costs to the products being manufactured. The overhead rate is crucial for determining the total job cost which combines direct labor, direct materials, and allocated overhead.