Thanks for the suggestions. That’s not the solutions I’m looking for.
Let me describe it differently.
I am looking for a solution where some products can already be paid online, while other products cannot. Let’s take steak as an example. That goes by weight. If someone wants 200 grams, it could be 180 grams, or 210 grams. The price is then not fixed.
That is why such products cannot be paid online, but other products with a fixed price can.
It may be that both types of products can be in one and the same shopping cart.