Can you please help and explain this problem,please?

Subn Financial data for Joel de Paris, Inc., for last year follow: Joel de Paris, Inc. Balance Sheet Beginning Balance Ending Balance Assets Cash Accounts receivable Inventory Plant and equipment, net Investment in Buisson, S.A. Land (undeveloped) Total assets Liabilities and Stockholders' Equity Accounts payable Long-term debt Stockholders' equity Total liabilities and stockholders' equity $ 132,000 342,000 568,000 858,000 403,000 253,000 $ 2,556,000 $ 133,000 481,000 482,000 844,000 431,000 255,000 $ 2,626,000 $ 375,000 997,000 1,184,000 $ 2,556,000 $ 342,000 997,000 1,287,000 $ 2,626,000 Joel de Paris, Inc. Income Statement Sales Operating expenses Net operating income Interest and taxes: Interest expense $ 111,000 Tax expense 201,000 Net income $ 4,992,000 4,093, 440 898,560 312,000 586,560 $ The company paid dividends of $483,560 last year. The "Investment in Buisson, S.A." on the balance sheet represents an investment in the stock of another company. The company's minimum required rate of return of 15%. Required: 1. Compute the company's average operating assets for last year. 2. Compute the company's margin, turnover, and return on investment (ROI) for last year.