Hey there,
i have got a question dealing with extending the oxbasket.
Following situation:
- I have got a surcharge, which I add to oxdelivery costs
- surcharge is displayed separated
The formatting methods for delivery costs are deprecated in OXID 5.1, so I have to find a new way to add additional costs to the basket.
Before I have done it by overwriting the formatting methods for delivery costs, I tried to add a new additional cost to the calculateBasket method, but then the validation for paying with credit card failed. 
Because of now displaying delivery costs with the help of an oxPrice smarty plugin, there is not a proper way to manipulate the delivery costs, if you do not want to do it into the view.
So anyone got an idea how to solve this problem?