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An investment center of Benson Corporation shows an operating income of $8,556 on total operating assets of $69,000. Required Compute the return on investment. (Round your answer to 2 decimal places. (i.e., 0.2345 should be entered as 23.45 ).) Benson Corporation has a desired rate of return of 8 percent. William Tobin is in charge of one of Benson's three investment centers. His center controlled operating assets of $2,500,000 that were used to earn $274,000 of operating income. Required Compute Mr. Tobin's residual income