<script type="text/javascript" charset="utf-8">
$(document).on('ready pjax:scriptcomplete',function(){
    var thisQuestion = $('#question{QID}');
 
    $('.answer-item.answer_cell_X002', thisQuestion).addClass('quantity');
    $('.answer-item.answer_cell_X004', thisQuestion).addClass('amount');
    $('.answer-item.answer_cell_X005', thisQuestion).addClass('sum');
 
    $('.sum input[type="text"]', thisQuestion).prop('readonly', true);
  
    $('.quantity', thisQuestion).on('change', function(i) {
      if($(this).closest('.answer-item').hasClass('answer_cell_X002')) {
         handleSum($(this));
      }
    });
    $('.amount', thisQuestion).on('change', function(i) {
      if($(this).closest('.answer-item').hasClass('answer_cell_X004')) {
         handleSum($(this));
      }
    });
 
    function handleSum(thisSelect) {
      var thisRow = $(thisSelect).closest('tr.subquestion-list');
      var item2 = $('.answer_cell_X002', thisRow);
      var item4 = $('.answer_cell_X004', thisRow);
      var item5 = $('.answer_cell_X005', thisRow);
      var w1=$('input:text', item2).val();
      var w2=$('input:text', item4).val();
      var w3=(w1*w2).toFixed(2);;
      if(w3>0) {
        $('input:text', item5).val('R$ ' + w3).trigger('change');
      } else {
        $('input:text', item5).val('').trigger('change');
      }
    }
});
</script>