Please answer Question 1 in 1a) 1b) 1c) format! Thanks. Please write answer in bulk for each question please. Please answer to best of your ability. Thanks. Will give good rating.

Question 1 The following selected data were taken from the books of the Owens O-Rings Company. The company uses a job-order costing system and applies manufacturing overhead cost to products on the basis of direct labour-hours. In computing a predetermined overhead rate at the beginning of the year, the company's estimates were: manufacturing overhead cost, 300,000; and direct labour hours 40,000. Two jobs were worked on during May 2021, the details of which were: Opening work-in-progress Direct materials cost Direct labour cost Direct labour hours Machine-hours Job 405 20,000 30,000 25,000 1500 2000 Job 406 25,000 30,000 38,000 400 5000 Required: a) What are the total costs of the Job 405 and the Job 406 (5 marks) b) Job 405 was completed during the month and consisted of 10,000 units. The company adds 40% to total production costs to arrive at a selling price. What is the selling price per unit? (2 marks) c) Why might a company use a predetermined rate for applying overhead rather than just apply actual overhead