I have two fields, we can call them "F1" and "F2." I am trying to get the F2 field to automatically say "4.6" when the field F1 is not empty. If it is empty I want field F2 to remain blank or be "0". The plan is to run a calculation of the "F2" (F2+F4+F6 etc) which is indicating acres to give a total acreage open (the open option is indicated in F1. Hope I explained this decently...I think it is an "IF" calculation bu I am not certain how to write it.