Thanks Jason, the only thing that is causing issue is that the additional $3.00 is applying to the XL as well which it should only be 2XL and Higher. This is what I currently have in the TotalPrice calculation:
((abs([Size] == '2XL' || [Size] == '3XL' || [Size] == '4XL' || [Size] == '5XL' || [Size]))?[Price] + 3:[Price]) * [Quantity]
The website store link is: products.php