Morrisey \& Brown, Ltd., of Sydney, Australia, is a merchandising firm that is the sole distributor of a product that is increasing in popularity among Australian consumers. The company's income statements for the three most recent months follow: (Note: Morrisey \& Brown, Ltd.'s Australian-formatted income statement has been recast into the format common in Canada. The Australian dollar is denoted by A\$.) (Note: Morrisey \& Brown, Ltd.'s Australian-formatted income statement has been recast into the format common in Canada. The Australian dollar is denoted by A$.) Required: 1. Identify each of the company's expenses (including cost of goods sold) as being variable, fixed, or mixed. 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 6,440 -unit level of activity using the contribution format. 4. Assume that the company's sales are projected to be 5,100 units in the next quarter. Prepare a contribution margin income statement