First, head over to the search page. From there you can add any schematics you want the total resource counts for. Once you've selected all the schematics you want the resources for, head back to the homepage (click "Schematics Browser V2" on the top-left of the page). The resource list will automatically show, alongside the list of the schematics you're looking at. From here you can remove schematics, or apply a reduction matrix. These will update the resource list without any further input from you. The list is in a spreadsheet-friendly format.