How can I allow a "0.00" dollar amount in a required field?

Question

I'm creating an expense form that has several fields marked a required. I've also included a java base print button that checks the fields and will open the print dialogue box if all the fields are completed. I'm wanting to allow a zero dollar amount to be entered into some of the fields though, but Acrobat sees that amount as an incomplete field. I've tried changing the format of the field in numerous combinations but I've got nothing.
Any solutions?
All help is greatly appreciated.
I'm using Acrobat XI Pro

Answer 1

The script I'm using to check the form and block the print is as follows:
var emptyFields = [];
for (var i=0; i<this.numFields; i++) {
     var f= this.getField(this.getNthFieldName(i));
     if (f.type!="button" && f.required ) {
          if ((f.type=="text" && f.value=="") || (f.type=="checkbox" && f.value=="Off")) emptyFields.push(f.name);
if (emptyFields.length>0) {
     app.alert("Error! You must fill in the following fields:\n" + emptyFields.join("\n"));
else this.print()