Exercise 18.23 Oslo Company's industrial photo-finishing division, Rho, incurred the following costs and expenses in the last period: Direct materials Direct labour Factory overhead General, selling, and administrative Totals Variable Fixed $213,000 138,000 75,000 $ 39,000 30,000 45,000 $456,000 $ 84,000 During the period, Rho produced 300,000 units of industrial photo prints, which were sold for $2.03 each. Oslo's investment in Rho was $560,000 and $760,000 at the beginning and ending of the year, respectively. Oslo's weighted average cost of capital is 15%. Determine Rho's return on investment for the year. (Round answer to 2 decimal places, e.g. 25.25%.) ROI % Compute Rho's residual income (loss) for the year. (Enter loss using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45).) Residual income (loss) How many industrial photo print units did Rho have to sell during the year to break even? (Round entry to whole amounts, e.g. 5,275.) Break even quantity units What was Rho's contribution margin for the year? Contribution margin