get total spent on steam

steam_total_spent.js

// ==UserScript==
// @name        transactions
// @namespace   store.steampowered.com/account
// @include     https://store.steampowered.com/account/
// @version     1
// @grant       none
// ==/UserScript==

var elements = document.getElementsByClassName('transactionRowPrice');
var total = 0
for (var i = 0; i < elements.length; i++){
    var ammount = elements[i].innerHTML;
    ammount = ammount.replace('$','');
    if (ammount == 'Free' || ammount == 'Total'){
        ammount = 0;
    }
    total += parseInt(ammount)
    //console.log(ammount);
}
alert(total);