We are evaluating dual flush fixtures for our residential project. I see in the Water Use Reduction guidance the weighted average methodology. And they comment on the 1:2 ratio of full to low flushes. This is the commercial usage pattern and is predicated on one "BM" per day. However, residential usage is 5 flushes per day (rather than 3). Are we to assume for the weighted average calculation that it is still a 1:2 ratio? That in fact for residential use there are 2.5 "BM's per day? Or do we stay with one full flush and 4 low flush uses?