Answer:
Concepts and reason
The concept used in the problem is process costing.
Process costing: It is the method of tracing the direct costs and allocating the indirect costs of the manufacturing process. It is used to ascertain the product cost at each stage of production. In this method, the costs that are incurred are averaged over the total production.
Fundamentals
Work-in-progress inventory (WIP): It is the raw materials, overhead costs, and labor costs incurred for products at various stages of the process of production. It is the part of the inventory asset account of the balance sheet.
Manufacturing Overheads: These are the costs in the process of manufacturing which are neither direct labor costs nor direct materials costs. Its value helps in determination of the costs of the manufactured product.
Manufacturing overhead rate: It is a predetermined rate for overheads incurred during the manufacturing process. It is computed by dividing the total estimated amount of manufacturing overheads with estimated value of the allocation base.
Inventory: Inventory refers to the material or goods that are seized by the organizations with a motive of selling it after some processing. It includes various categories that are work in process, finished goods, and raw material.
Detailed solution is given below: