The Central Division of National, Inc, has operating income of $17.100 on sales revenue of $155,000. Divisional operating assts $82,600, Required a. Using the DuPont model, calculate The Central Division's margin, turnover, and ROI. (Do not round intermediate calculations Round your answers to 2 decimal places) Central Division Margin Turnover ROI turns b. Calculate The Central Division's residual income. Residual income