When establishing the material cost for MR credits, is the cost of materials defined by what the general contractor pays to buy a product or what the manufacturer pays to manufacture a product? We multiply that value by the stated percentage of recycled content by weight for assembled products. For example - for precast concrete elements, the contractors "material" cost (without their installation labor, overhead and profit) is the fully manufactured cost of the cast stone plus delivery. However the manufacturer's "material cost" (without their manufaturing labor, overhead and profit) is much less due to the large amount of labor involved in the manufacturing. The general contractor's material cost to purchase the precast may be $100,000, but the manufacturer's material cost to manufacture it may only be $20,000. The LEED reference manual seems to lean toward the cost to the general contractor, and says that you should "exclude any costs for labor and equipment once the material has been delivered to the site". No mention of the manufacturer's labor and equipment costs, so it seems like they are referring strictly to the GC's cost. Any thoughts? Thanks