Enneagon Pty Ltd is a manufacturing firm that produces customised office gifts according to customers' orders. The company adopts the job order costing system, and manufacturing overhead is allocated to production at a predetermined overhead rate of 200 percent of direct material cost. According to the company's policy, any over-or under-allocated manufacturing overhead is written off to the cost of goods sold. The firm does not have any work-in-process at the beginning or end of the quarter. Below is the financial information for the 4th quarter of 2021: Direct material used Direct labour cost incurred Indirect labour cost incurred Indirect material used Selling and administrative expenses Depreciation of factory building Depreciation of factory equipment Insurance on factory and equipment Electricity for factory Finished goods inventory, October 1st Finished goods inventory, December 31 $220,000 $700,000 $130,000 $80,000 $600,000 $100,000 $70,000 $50,000 $30,000 $0 $500,000 (a) Calculate the cost of goods manufactured for the company for the 4th quarter of 2021. Clearly show the workings of the calculation. (b) Calculate the difference between the actual manufacturing overhead cost incurred and the manufacturing overhead cost allocated. Identify whether it is under- allocated or over-allocated. Clearly show the workings of the calculation. (c) Calculate the adjusted cost of goods sold for the 4th quarter of 2021. Clearly show the workings of the calculation.(d) Provide one reason why firms use budgeted overhead allocation rate to allocate manufacturing overhead rather than use the actual manufacturing overhead cost and justify your answer. (e) The company considers if there are alternative adjustment methods for the over- or under-allocated manufacturing overhead. Suggest one alternative adjustment for the company to consider. In the context of Enneagon Pty Ltd, would it be better for the manager to follow the existing policy or to switch to the alternative adjustment method you suggest? Explain.