Hide $0.00 Field Total on Print

I am having trouble getting the total field to not show on print so the user can fill the form out manually without having to cross it out. I've tried a couple of the custom validation scripts suggested in these boards but still cannot get it to work.

I've tried:

if (event.value==0) event.value = "";

And this:

var fields = ["Stipend", "Meal per diem", "Mileage total"];

var allEmpty = true;

var total = 0;

for (var i in fields) {

    var f = this.getField(fields);

    if (f.valueAsString!="Off") {

        total+=Number(f.valueAsString);

        allEmpty = false;

    }

}

if (allEmpty) event.value = "";

else event.value = total;