Required information Exercise 13-33 Improving ROI (LO 13-2, 13-3) [The following information applies to the questions displayed below.] The following data pertain to British Isles Aggregates Company, a producer of sand, gravel, and cement, for the year just ended. denotes the British pound sterling, the national monetary unit of Great Britain. 2. If the sales and average invested capital remain the same during the next year, to what level would total expenses have to be reduced in order to improve the firm's ROI to 20 percent