Calculating Average Operating Assets, Margin, Turnover, and Return on Investment Barnard Manufacturing earned operating income last year as shown in the following income statement: Sales $4,000,000 Cost of goods sold 2,100,000 Gross margin $1,900,000 Selling and administrative expense 1,100,000 Operating income $ 800,000 Less: Income taxes (@ 40%) 320,000 Net income $480,000 At the beginning of the year, the value of operating assets was $2,700,000. At the end of the year, the value of operating assets was $2,300,000. Required: For Barnard Manufacturing, calculate: 1. Average operating assets 2. Margin 3. Turnover 4. Return on investment