No that didn't work either.
I created a form "MembDisc" on the cart page with a checkbox named "Member" with a checked value of "Member." All I want to do is have the cart subtotal reflect a 10% discount if the box is checked.
Do you have a code snippet I can paste into the WA_Store_Cart_PHP.php page to complete this task? I don't envision needing to change the cart object beyond that.