I'm trying to add a One-Time Per Order $25 HazMat fee to the shopping cart sub-total. First i tried to add to $cartShowTotal in tpl_shopping_cart_default, but couldn't of course because i did a var_dump and see that it is a string. and the var name itself it hints it is for display purposes only(?).
i know that this is a heady question, but where would i find the heart of the shopping cart calculator? or, the file that performs the shopping cart sub-total as it gets put onto the tpl_shopping_cart_default page?
i did look in ...
modules/pages/shopping_cart/header_php.php
and see $cartShowTotal equals show_total().
i know i'm in over my head but i have to do this ;-)
big thanks,
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