Firm J has net income of $70,980, sales of $910,000, and average total assets of $455,000. Required: Calculate Firm J's margin, turnover, and return on investment (ROI). Margin Choose Numerator: / Choose Denominator: 1 1 Margin Margin 11 11 Turnover Choose Denominator: = Choose Numerator: Turnover Turnover 1 = = 1 Return on Investment Choose Numerator: Choose Denominator: 1 Return on Investment Return on Investment 11 =