Why is providing Total Material Cost required/necessary when completing a LEED v4.1 Materials Reporting Form? How is this relevant for LEED purposes, especially if it is almost always subject to change as the project progresses? It's impossible to know what the total cost will be until project completion. What if a Bulletin is released that doubles the amount of material to be used immediately after these forms have already been completed and submitted? What if one vendor charges more than another vendor for the same product? If I submit a LEED form to a General Contractor, how would they even be able to verify that the total cost is accurate? Please help me understand why the total material cost carries any relevance whatsoever, because it just seems like an excuse for General Contractors and Construction Managers to find out about internal costs/financials from companies that may not otherwise want to share this information.