Ok, here we go, I have one field minus one field equals another, More specific: [Ordered Quan]-[Delevered Quan]= [Back Order]. The problem I am running into is that when I have two minuses for example, "[Ordered quan]" is minus one and "[Delevered Quan]" is minus one, then back order is also minus one. What I need is to have back order read "0" Does anyone know how to do this?