Consolidated Industries is a diversified manufacturer with business units organized as divisions, including the Reigis Steel Division. Consolidated monitors its divisions on the basis of both unit contribution and return on investment (ROI), with investment defined as average operating assets employed. All investments in operating assets are expected to earn a minimum return of 11% before income taxes. Reigis's cost of goods sold is considered to be entirely variable; however, its administrative expenses do not depend on volume. Selling expenses are a mixed cost with one-third attributed to sales volume. The 2022 operating statement for Reigis follows. The division's operating assets employed were $147,750,000 at November 30,2022 , unchanged from the year before. Required: 1. Calculate Reigis Steel Division's unit contribution if it produced and sold 1,900,000 units during the year ended November 30,2022. (Round your answer to 2 decimal places.) 2. Calculate the following performance measures for 2022 for Reigis: a. Pretax ROI, based on average operating assets employed. (Round your answer to 2 decimal places.) b. Residual income (RI), calculated on the basis of average operating assets employed. (Enter your answer in whole dollars, not in thousands.) \begin{tabular}{|l|l|l|l|} \hline 1. & Contribution margin & & per unit \\ \hline 2a. & Return on investment & & % \\ \hline 2b. & Residual income & & \\ \hline \end{tabular}