[kingb]

Hi brother, there's a little bug on your shop, nothing major though. For example: when you add to the shopping cart a card that costs $10 and another that costs $15, instead of it calculating the exact total of $25 for both cards, your system calculates 2x $15 giving it a higher price of $30.
When you add multiple cards to the cart, the difference can be quite high.
I'm pretty sure it's an easy fix though.