Simple ROI question

Just want to make sure I’m doing this calculation correctly. Trying to find a simple ROI on some assets we acquired over the years. Calculation ignores TVM and is very simplified. ROI: Take Expected Sales Price Plus: Sum of Yearly Cash Flow Generated Minus: Total Acquisition Price Minus: Capital Expenditures = Expected Gain on Sale ROI = Expected Gain on Sale / Total Acquisition Price + Capital Expenditures Is this correct? Any help would be appreciated, thanks.