How to display null until user enter data?

[Former Community Member]

This is probably simple, but I can't seem to figure it out. I've got a form that does a variety of calculations and at the moment it displays 0s in the totals boxes. I want it so that it doesn't display anything until a user enters data into one of the other fields, since a user could print the form and fill it out manually or fill it electronically. So what do I need to set to have the total field blank until data gets entered into another field?