Installing Tracking: Magento Shopping Cart

The below two files should be for whichever template you have got running.

OPEN FILE: app/design/frontent/default/your_template/template/checkout/success.phtml

OR: app/design/frontent/default/default/template/checkout/success.phtml

BELOW:

<?php echo $this->__('Your order # is: %s', $this->getViewOrderUrl(), $this->getOrderId()) ?>.
<?php else :?>
<?php echo $this->__('Your order # is: %s', $this->getOrderId()) ?>.
<?php endif;?>

PASTE:

<?php

$order_details = Mage::getModel('sales/order')->loadByIncrementId(Mage::getSingleton('checkout/session')->getLastRealOrderId());
?>
<script>
<!--
var value="<?PHP echo $order_details->subtotal; ?>";
var ref="<?PHP echo $this->getOrderId(); ?>";  
var mid="XXXX";
var goalid="XXXX";
//-->
</script>
<script src="https://aflite.co.uk/js/track.js"></script>