Question #4. - 12 Marks The Central Valley Company is a merchandising firm that sells a single product. The company's revenues and expenses for the last three months are presented below: CENTRAL VALLEY COMPANY Comparative Income Statement for the Second Quarter Required: a. Determine which expenses are variable, fixed or mixed (6 Marks) b. By use of the high-low method, separate each mixed expense into its variable and fixed components. State the cost formulae for each mixed expense.(6 Marks) c. Compute the company's total contribution margin for May. Complete a contribution margin statement (6 Marks)