Where would I find the information needed to calculate the recycled content of a finished product. If said product contains various types of wood products, glass, decorative metals, muti colored & muti brand plastic laminates, plus various types of hardware, solid surface materials of which contain different amounts of recycled content, from various manufacturers, and most distributing vendors that sell the products have never heard of LEED. There is also misc. components such as screws, Steel Brackets, shims, dowels adhesives, grommets some plastic some metal. What method of calculating should be used to determine the recycled content of the final finished product.