I would like to add, that our shop ships internationally. There is three different shipping/tax options. The cart, confirm and success page display the invoice only, the customer pays later.
1. Shipment to Germany: Total includes flat shipping fee and tax.
2. Shipment to rest of Europe: Total includes tax.
3. Shipment to all other countries: Total is just the net amount (to display that, I am just using the columns subtotal).
So, how would I display a GrandTotal, that does not include shipping.