Assume that Corbin Enterprises classifies all operating expenses into two categories: (1) selling and (2) general and administrative. - Required: 1. Prepare a multiple-step income statement for the currentyear. 2. What advantages do you see in this form for the income statement? 3. Compute Corbin's profit margin. 4. Comment on Corbin's profitability. What other factors need to be taken into account to assess Corbin's profitability