a) Companies implements cost accounting, particularly from the perspectives of the value (supply) in improving their customer profitability. We do not agree with the statement that cost accounting distorts product costs. Discuss TWO (2) factors that result in successful delivery from the initial acquisitions of materials, labor and factor overhead to the sales of products and/or services to customers. (3 marks) b) After discussing introduction to cost accounting with your students, one of them asked you about electrical costs (utilities expenses). Explain in TWO (2) points regarding electrical costs (utilities expenses), which is an example that you gave them about factory overhead, from the perspective of cost behavior. (2 marks) c) Your students submitted a group project with the following information related to revenues and expenses for a period of three months. July August September Sales in units 3,000 3.750 4,500 Sales revenue Dh 420,000 Dh 525,000 Dh 630,000 Cost of goods sold 168,000 210,000 252,000 Gross margin 252,000 315.000 378,000 Selling and administrative expenses: Shipping expense 44.000 50,000 56.000 Advertising expense 70,000 70,000 70.000 Salaries and commissions 107.000 125.000 143,000 Insurance expense 9,000 9,000 9,000 Depreciation expense 42.000 42,000 42,000 Total selling and administrative expense 272,000 296.000 320,000 Net operating income (loss) (20,000) 19,000 58,000 Determine which expense(s) are mixed and separate each mixed expense into variable and fixed elements. (Show your workings) (2 marks)