[Locked] I need help with populating fields from dropdown box

I have a dropdown box with 3 possible values, I want to populate 21 additional fields with values, these values are dependent on the values in the dropdown box.

This what I have for one field and I can duplicate for the other fields

But this does not work and I am getting Error

InvalidSetError: Set not possible, invalid or unknown.

Event.value:6:Field S5X:Mouse Up

var one = this.getField("Dropdown9");
if(one.valueAsString != "500") {
event.value= "0";
}
else{
event.value = "234.567";
}