This script from your tutorial not working
var Classes = Number(Apperyio("Classes").val());
var percentage = Number(Apperyio("percentage").val());
var Bunklimit = Classes ;
var BunkPercentage = Percentage ;
Apperyio('Bunklimit').text('$' + Bunklimit.toFixed(2));
Apperyio('BunkPercentage').text('$' + BunkPercentage.toFixed(2));