Flat Rate Markup of Live Rates
Sometimes you may need to increase a certain live rate or group of live rates by a certain amount to add your own markup to the returned rates from the shipping provider. This script allows you to do just that, with this script being designed to run after the shipping rates are returned. Paste the code just before the closing
</head> tag of your checkout template and edit as needed.
You can add anything you want within that code, and it will only be run when the shipping rate requests returns.