Zims, a national manufacturer of lawn$-$mowing and snow$-$blowing equipment, segments its business according to customer type: Professional and Residential. Assume the following divisional information was available for the past year $($in thousands of dollars$)$:

$($Click the icon to view the information.$)$

Read the requirements.

Requirement $1.$ Calculate each division's ROI.

First enter the formula, then calculate each division's ROI using the expanded formula.