Financial data for Windsor, Inc. for last year appear below: Ending Balance Windsor, Inc. Statements of Financial Position Beginning Balance Assets Cash $ 335,000 Accounts receivable 157,000 Inventory 232,000 Plant and equipment (net) 448,000 Investment in Pine Company 268,000 Land (undeveloped) 317,000 $ 94,220 197,000 284,000 468,000 349,000 317,000 Total assets $1,757,000 $1,709,220 $ Liabilities and owners' equity: Accounts payable Long-term debt Owners' equity 157,000 812,000 788,000 $ 221,000 812,000 676,220 Total liabilities and owners' equity $1,757,000 $1,709,220 Windsor, Inc. Income statement Sales Less operating expenses $ 2,400.000 2,136,000 264,000 Net operating income Less interest and taxes: Interest expense Tax expense $ 97,100 97,680 194,780 Net income $ 69,220 Required: a. Compute the company's margin, turnover, and return on investment for last year. (Do not round your intermediate calculations. Round your final answer to 2 decimal places. Omit the "%" sign in your response.) Margin Turnover Return on investment b. The Board of Directors of Windsor, Inc. has set a minimum required return of 22%. What was the company's residual income last year? (Do not round your intermediate calculations. Round your final answer to 2 decimal places. Omit the "$" sign in your response.) Residual income