updateSubTotal(); // Initial call

function updateSubTotal() {
  var table = document.getElementById("myTable");
  let subTotal = Array.from(table.rows).slice(1).reduce((total, row) => {
    return total + parseFloat(row.cells[1].innerHTML);
  }, 0);
  document.getElementById("val").innerHTML = "SubTotal =" + (subTotal.toFixed(2) / 742);
}