Calculating Average Operating Assets, Margin, Turnover, and Return on Investment East Mullett Manufacturing earned operating income last year as shown in the following income statement: Sales $3,750,000 Cost of goods sold 2,250,000 Gross margin $1,500,000 Selling and administrative expense 1,200,000 Operating income $ 300,000 Less: Income taxes (@ 40%) 120,000 Net income $ 180,000 At the beginning of the year, the value of operating assets was $1,600,000. At the end of the year, the value of operating assets was $1,400,000. Round your answers to two decimal places, when rounding is required. Required: For East Mullett Manufacturing, calculate: 1. Average operating assets 2. Margin of 3. Turnover 4. Return on investment %%