This is fun! so, I'm hoping I'll be able to finish what I've started ...
I'm working on a festival registration form with an accommodation section: here, whoever is filling in the form specifies the type of accommodation (four options in a pull-down) and the number of days (four options in a "multiple choice"). How do I use this information to calculate the price due ‒ room-type as Product and number of nights as Options, perhaps? but then the user has to provide the information twice :-{