total bills on online.net https://console.online.net/en/bill/list

online.net.total_bill.js

// execute on https://console.online.net/en/bill/list
(function(){
  const rex=/^\s*(?<amount>\d+(?:\.\d+)?)\s*\€\s*$/;
  // rex.exec(text).groups.amount
  let total=0;
  $("table:last >> tr:not(:first) > td:nth-child(5)").each(function(){
    const plus=rex.exec(this.textContent).groups.amount;
    console.log(plus);
    total+=Number(plus);
  });
  return total;
})();