Although my school doesn't compare to Bama in terms of rush, we do have a lot of girls coming through (about 1,000). They always tell the chapters after recruitment orientation that quota could be in the 100's. They factor that just by dividing the amount of girls at the orientation by the number of chapters. As we all know, a lot happens during recruitment week; girls drop out or girls are cross cut. We still end up with a large pledge class (around 70) but that's better than 100!