test -1

by Joe

HTML

<label>1</label>
<input type="number" id="joe">

<label>2</label>
<input type="number" id="plumz">

<label>Total</label>
<input type="number" id="total">

JavaScript

// delete function
$("table.order-list").on("click", ".ibtnDel", function(_event) {
  var total = $('#totaldbt').val();
  var delVal = $(this).closest("tr").find('input').val();
  var val = parseFloat(delVal);
  if (!isNaN(val))
    total -= val;
  $('#totaldbt').val(total);
  $(this).closest("tr").remove();
})