Firm J has net income of $124,800, sales of $960,000, and average total assets of $640,000. Required: Calculate Firm J's margin, turnover, and return on investment (ROI). Margin Choose Numerator: / Choose Denominator: 1 1 Margin Margin Turnover Choose Numerator: / Choose Denominator: = Turnover / Turnover Return on Investment Choose Numerator: / Choose Denominator: Return on Investment 1 1 Return on Investment =