title: Set value on Interactive grid columns to another column
body: <p><br>
  I have an issue with IG if there any one can help me.<br>
  I upgraded to Oracle APEX 18.2, So I have to get rid of all Tabular forms and change it to Interactive Grids, the problem is that when I need to compute Net Value (QTY*UNIT_PRICE), I used to create a dynamic action like this:<br>
  <code><code>var row_id = $(this.triggeringElement).attr('id').substr(4);</code>
  $('#f11_'+row_id).val(parseInt($('#f04_'+row_id).val()) * parseFloat($('#f10_'+row_id).val()))</code><br>
  Does anyone know how to do it in interactive grid?<br>
  Regards</p>