Question 4: (25 Marks) A Classify the following into the Fixed costs, Step costs, Variable and Semi Variable costs. 1. Annual salary of the chief accountant (10 Marks) 2. Supervisor salary costs, where one supervisor is needed for every ten employees added to the staff 3. Cost of materials used to pack 20 units of product X into a box 4. Wages of warehouse staff paid hourly 5. Power for plant and machinery 6. Rent of factory building 7. Accountant's annual membership fee to Professional accountants' association (paid by the company). 8. Salesman's commission Fixed Line telephone bill 10. Interest paid on bank loan B. Below is the Total Costs & Units Produced at various activity levels. (15 Marks) Total Cost in Omani Rials Units Produced 6,000 8,000 500 Units 700 Units 20,000 1,900 Units 9,000 800 Units 15,000 1,400 Units 10,000 900 Units 7,000 600 Units Using High/Low method, calculate: 1. Variable Cost per unit 2. Total Fixed Cost (4 Marks) (4 Marks) 3. Total Cost at an activity level of 5000 units. (4 Marks) 4. Cost per unit at an activity level of 5000 units. (3 Marks)