I am a new employee to a contractor and have been tasked with handling LEED for a project that is to be finished in a month. The previous group handling LEED did not track the total cost of materials on the job. Architect has informed hat we can take 45% of the cost of all Div 3-10 and 31/32 contracts and use this as a materials cost which we would then have to achieve 20% of. Where can I find the exact LEED ruling on this and is there a better way to go about calculating the material costs?