Tampermonkey user script to convert fuel to gallons at FSE World goods page

fuse-fuel-in-gal.js

// ==UserScript==
// @name         FSE Fuel in Gallons
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  convert fuel to gallons at FSE World goods page
// @author       jsilva74
// @match        https://server.fseconomy.net/goods.jsp
// @icon         https://www.google.com/s2/favicons?sz=64&domain=fseconomy.net
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

  const addFuelAmountInGallons = () => {
      const table = document.querySelector('table')
      if (!table) return
      for (let i = 1; i < table.rows.length; i++) {
          const row = table.rows[i]
          const isFuel = row.cells[1].innerText.includes('Fuel')
          const amountInKg = parseInt(row.cells[2].innerText.split(' ')[0])
          const amountText = [`${amountInKg.toLocaleString('en-US', { minimumFractionDigits: 0, maximumFractionDigits: 0 })} Kg`]
          if (isFuel) {
              const amountInGallons = Math.trunc(parseInt(amountInKg) / 2.68735)
              amountText.push('=', `${amountInGallons.toLocaleString('en-US', { minimumFractionDigits: 0, maximumFractionDigits: 0 })} gal`)
          }
          row.cells[2].innerText = amountText.join(' ')
      }
  }

  document.addEventListener('load', addFuelAmountInGallons(), false)
})();