Adwords Conversion Tracking with dynamic values.

Hi,
Does anyone have try to add a Adwords Convertion Tracking Code in WP-Ecommerce?

I try to search online and this is what i found :

<!– Google Code for Purchase Conversion Page –>
<script type=”text/javascript”>
/* <![CDATA[ */
var google_conversion_id = 1234567890;
var google_conversion_language = “en_US”;
var google_conversion_format = “1”;
var google_conversion_color = “666666”;
var google_conversion_label = “Purchase”;
var google_conversion_value = 10;
if (<? echo $totalValue ?>) {
var google_conversion_value = <? echo $totalValue ?>
}
var google_conversion_currency = “USD”;
/* ]]> */
</script>
<script type=”text/javascript”
src=”//www.googleadservices.com/pagead/conversion.js”>
</script>
<noscript>
<img height=1 width=1 border=0
src=”//www.googleadservices.com/pagead/
conversion/1234567890/?value=
<? echo $totalValue ?>&label=Purchase&script=0″>
</noscript>

But where to add this code?

https://wordpress.org/plugins/wp-e-commerce/