buynow paid calculator

buynow_calculator.js

var total = 0;
const paid_amounts = document.getElementsByClassName("purchase-amount-number");

var persianNumbers = [/۰/g, /۱/g, /۲/g, /۳/g, /۴/g, /۵/g, /۶/g, /۷/g, /۸/g, /۹/g];
var arabicNumbers  = [/٠/g, /١/g, /٢/g, /٣/g, /٤/g, /٥/g, /٦/g, /٧/g, /٨/g, /٩/g];

fixNumbers = function (str)
{
  if(typeof str === 'string')
  {
    for(var i=0; i<10; i++)
    {
      str = str.replace(persianNumbers[i], i).replace(arabicNumbers[i], i);
    }
  }
  return str;
};

for(e of paid_amounts)
{
  total += parseInt(fixNumbers(e.innerHTML.trim().replace(",", "")));
}