That is a good idea Frank. Don't know if it would work for me. I have only a few products but each product has multiple options.
I noticed this morning that when editing the ecart object - calculations - the add to formula (plus sign) would not work. Same issue. When I click on the plus signt, the list appears but cannot add anything to the calculation. Of course, there is an easy work around for this as I can type it all out. Thought it was worth mentioning though.