Financial data for joel de paris, inc., for last year follow: joel de paris, inc. balance sheet beginning balance ending balance assets cash $ 134,000 $ 126,000 accounts receivable 342,000 487,000 inventory 567,000 481,000 plant and equipment, net 807,000 796,000 investment in buisson, s. a. 409,000 428,000 land (undeveloped) 251,000 254,000 total assets $ 2,510,000 $ 2,572,000 liabilities and stockholders' equity accounts payable $ 378,000 $ 340,000 long-term debt 1,010,000 1,010,000 stockholders' equity 1,122,000 1,222,000 total liabilities and stockholders' equity $ 2,510,000 $ 2,572,000 joel de paris, inc. income statement sales $ 3,927,000 operating expenses 3,337,950 net operating income 589,050 interest and taxes: interest expense $ 110,000 tax expense 199,000 309,000 net income $ 280,050 the company paid dividends of $180,050 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. (do not round intermediate calculations and round your final answers to 2 decimal places.)
3. what was the company’s residual income last year?