BOM move items

If I make a weldment. I want to keep like materials together(all angles, plates, etc) to make it easier on the guy cutting thesteel. If I click on the BOM I can drag the line up or down but itstill has that item no. So, if I moved item 7 up below 5, 6 isafter 7 now in the item no's. How do I get it to renumber?ThanksSolidworksDrawings And Detailing