If we’re calculating the ROI of an ad campaign or a project, we should only consider revenue from these projects or campaigns. As for costs, only include your spending on a particular project or campaign. If we’re curious about the profitability of a marketing campaign (ROMI), we’re only considering our expenses within this campaign. For example, we’re taking into account our expenses on printed materials, billboard lease, and so on, and we don’t consider manufacturing expenses. The calculation results are in percentages.