Return on investment $($ROI$)$ could be calculated using which of the following formulas?

Multiple Choice

$-$ Margin x $($Net operating income $/$ Sales$)$

$-$ Margin x $($Sales $/$ Net operating income$)$

$-$Margin x $($Average operating assets $/$ Sales$)$

$-$ Margin x $($Sales $/$ Average operating assets$)$Return on investment $($ROI$)$ could be calculated using which of the following formulas?

Multiple Choice

Margin $($Net operating income $$ Sales$)$

Margin Sales $$ Net operating income$)$

Margin Average operating assets $$ Sales$)$

Margin Sales $$ Average operating assets$)$