marwick’s pianos, inc. traditional income statement for the month of august sales ( pianos × $ per piano) $ cost of goods sold ( pianos × $ per piano) gross margin selling and administrative expenses: selling expenses: advertising $ sales salaries and commissions [$ ( % × $ )] delivery of pianos ( pianos × $ per piano) utilities depreciation of sales facilities total selling expenses administrative expenses: executive salaries insurance clerical [$ ( pianos × $ per piano)] depreciation of office equipment total administrative expenses total selling and administrative expenses net operating income $