Hello. I am managing the conference sites of the linguistics study at my university. And now I want to make a registration form where people can register for a conference. For there are different prices: 30 € per day and 90 € for the whole conference, I need a little box like "Final fee: XXX" that shows the final price directly under the checkbox whith the choosable days. Furthermore this price should appear in the confirmation e-mail.
But is that calculation box possible and how would I have to include it? It would just have to do the following: Sum up the days/30€ and saying that when there are equal or more than three days it is always 90 €.
Thanks in advance!