The cost value for LEED calculation is determined by separating each component by weight as a percentage of the total. For example, if a $100 piece of built-in casework contains 80% (by weight) salvaged wood and 20% (by weight) new marble, $80 worth (80%)

The cost value for LEED calculation is determined by separating each component by weight as a percentage of the total. For example, if a $100 piece of built-in casework contains 80% (by weight) salvaged wood and 20% (by weight) new marble, $80 worth (80%) of casework would contribute to this credit, because that is the only component part that is reused. (See the Documentation Toolkit for a reuse assembly calculator.)