Order Total for google ad conversion script

[jesus_automatic]

I am setting up Google Ad conversion tracking, by inserting code in
/storefront/controller/pages/checkout/success.php
Firstly is that the correct place.
Secondly I want to return the total value. My guesswork has led me to the expression <? echo $order_total ?>
Am I getting close? If not, what do I need)?

[eCommerce Core]

Check this file in 1.1.8 branch
https://github.com/abantecart/abantecart-src/blob/169f4e69c709bbc0547952686e5716cb7884901d/public_html/storefront/controller/pages/checkout/success.php

There is analytic that does tracking. Hope this will help

[jesus_automatic]

Thanks, that is what I needed. I think I have it working in spite of Googles automatically generated js being wrong.
Anyone else struggling with this, I suggest speaking to google adword technical support. They were surprisingly helpful!