Exercise 9-8A Return on investment LO 9-2 Rooney Company calculated its return on investment as 10 percent Sales are now $430,000, and the amount of total operating assets is $450,000. Required a. If expenses are reduced by $42,300 and sales remain unchanged, what return on investment will result? (Round your answer to 2 decimal places. (.e...2345 should be entered as 23.45).) b. If both sales and expenses cannot be changed, what change in the amount of operating assets is required to achleve the same result? (Do not round Intermediate calculations. Round your answer to the nearest whole dollar amount.) Answer is complete but not entirely correct. % Return on investment Operating assets must 19.40 decrease b. by S423,000