Hi - the first drop down for your condition won't let you select a formula. Usually, what I do is leave the first two drop downs in the condition at their default values, then change the third to "use a formula". In the formula builder, I create my formula (in your case, field1 + field2 + field3 > 25, with your actual fields, of course). Then, back in the condition, I change the first drop down to "the expression" which will display the entire XPath for the condition. It will probably start with "somefield = " and the rest will be your formula. Delete the "somefield =" and you should be good to go.
Hilary Stoupa
