What do I change
I understand what you are saying but how do I check the cart subtotal in the calculation? I note I can see a totalcolumn('totalprice') calculation in the confirm.php page so I know it's there - how do I get it into my calculation?
So i am changing the Calculation from (([Quantity]*[Price])<12)?(2.95):0 to ...?
Can I use a subtotal variable in the calculation?