Mini-Exercise 3-1 (Algo) ROI analysis using the DuPont model LO 3-3 Firm J has net income of $84,480, sales of $960,000, and average total assets of $640,000. Required: Calculate Firm J's margin, turnover, and return on investment (ROI). S Margin Choose Numerator: Choose Denominator: Turnover Choose Numerator: Choose Denominator: 11 Margin Margin Turnover Turnover Return on Investment Choose Numerator: Choose Denominator: = Return on Investment = Return on Investment =