I need help answering the below:

Pollux Company had the following income statement for last year: Sales $360,000 Less: Cost of goods sold 195,000 Gross margin $165,000 Less: Selling & administrative expense 78,600 Operating income $ 86,400 Beginning assets were $565,000 and ending assets were $597,000. (Carry computations out to three decimal places.) A What are average operating assets? B. What is margin? C. What is turnover? D What is ROI