// This function removes non-numeric characters
	function tlg_stripNonNumeric( str ){
	  str += '';
	  var rgx = /^\d|\.|-$/;
	  var out = '';
	  for( var i = 0; i < str.length; i++ ){
		if( rgx.test( str.charAt(i) ) ){
		  if( !( ( str.charAt(i) == '.' && out.indexOf( '.' ) != -1 ) ||
				 ( str.charAt(i) == '-' && out.length != 0 ) ) ){
			out += str.charAt(i);
		  }
		}
	  }
	  if(out == '') {
	    out = 0;
	  }
	  
	  return out;
	}
	
function numberFormat(nStr){
  nStr += '';
  x = nStr.split('.');
  x1 = x[0];
  x2 = x.length > 1 ? '.' + x[1] : '';
  var rgx = /(\d+)(\d{3})/;
  while (rgx.test(x1))
    x1 = x1.replace(rgx, '$1' + ',' + '$2');
  return x1 + x2;
}
	
  function tlg_calc() {
    var fTtl = 0;
    
    var offer1Mult = 1;
    var offer2Mult = 1;
    var offer3Mult = 1;
    var offer4Mult = 1;
    var offer5Mult = 1;
    var offer6Mult = 1;
    var offer7Mult = 1;
    var offer8Mult = 1;

    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer1').value)) * parseFloat(offer1Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer2').value)) * parseFloat(offer2Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer3').value)) * parseFloat(offer3Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer4').value)) * parseFloat(offer4Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer5').value)) * parseFloat(offer5Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer6').value)) * parseFloat(offer6Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer7').value)) * parseFloat(offer7Mult));
    fTtl += (parseInt(tlg_stripNonNumeric(document.getElementById('offer8').value)) * parseFloat(offer8Mult));
    
    
    document.getElementById('finalCalc').innerHTML = numberFormat(fTtl * 12);
  }