In the reference guide there are a few different ways to determine recycled content value. When we are purchasing different materials/parts ie aluminum extrusions, aluminum panels, fasteners, insulated glass, sealants, to build a final product (WIndow System, Curtainwall) should we be using equation 1 referenced on page 372 and add each material up or use equation 3 on page 373? If we have to use equation 3 could someone please help expound on this? Is assembly cost the cost of all the parts and labor? This last questions ties into my questions in theMRc5 forum yesterday.
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