Akoroda Manufacturing Nigeria Limited is a medium-sized enterprise located in Trans-Amadi Industrial Layout, Port Harcourt, Rivers State. The company produces specialized valve fittings used in the oil and gas servicing industry. The Managing Director recently attended an executive seminar where the importance of cost classification and cost behaviour in managerial decision-making was emphasized. Following the seminar, the Management Accountant was requested to review the cost structure of the plant and establish reliable cost formulas for budgeting and pricing decisions for the upcoming financial year. The historical data collected for machine maintenance costs and activity levels (measured in machine hours) over the last six months are presented below: | Month | Machine Hours | Maintenance Cost (₦) | |---|---|---| | July | 8,000 | 4,200,000 | | August | 10,500 | 5,200,000 | | September | 6,500 | 3,600,000 | | October | 11,000 | 5,400,000 | | November | 9,000 | 4,600,000 | | December | 7,500 | 4,000,000 | Required: (a) Explain clearly the following cost classification concepts, providing one practical example of each in the context of a manufacturing company in Nigeria: (i) Direct cost versus Indirect cost (ii) Stepped fixed cost (iii) Opportunity cost (6 marks) (b) Using the High-Low method, analyze the machine maintenance cost data to determine: (i) Variable maintenance cost per machine hour. (ii) Total fixed maintenance cost per month. (iii) The linear cost equation in the form of Y = a + bX. (8 marks) (c) The company plans to expand operations in the next quarter, projecting an activity level of 12,500 machine hours for the month of January. However, due to general inflation and an increase in factory supervisory personnel, fixed maintenance costs are expected to increase by 15%. Calculate the total projected maintenance cost for the month of January. (6 marks) (Total: 20 marks)