Required: 1. Identify each of the company's expenses (including cost of goods sold) as being variable. fived, or miked. 2-a. Using the high-low method, separate each mixed expense into variable and fixed elements. 2-b. Using the high-low method, state the cost formula for each mixed expense. 3. Redo the company's income statement at the 6,200-unit level of activity using the contribution format. 4. Assume that the company's sales are projected to be 5,000 units in the next quarter. Prepare a contribution margin income statement