Where do I set the ROI % for the export data point called ROI Custom% FBA Sell Price?

Where do I set the ROI % for the export data point called ROI Custom% FBA Sell Price?

The data export field called ROI custom% FBA Sell Price (as shown in figure 1) uses a custom ROI% percent that is set in the calculator settings under the section Set default custom ROI%, Profit to estimate Sell Price (as shown in figure 2)