Morrisey & Brown, Ltd, of Sydney, Australia, is a merchandising firm that is the sole distributor of a production that is increasing in popularity among Australian consumers. The company's income statements for the three most recent months follow: Required: Identify each of the company's expenses (including cost of goods sold) as being variable, fixed, or mixed. Using the high-low method, separate each mixed expense into variable and fixed elements. State the cost formula for each mixed expense. Redo the company's income statement at the 5,000-unit level of activity using the contribution format