TOPIC: adult / child / family

hello, how can i set up a site with :
adult : 18
child : 15
Family (2 A + 1or more child ) : 55

thanks

You can create a custom selection field. I would suggest this:

- Event setup with only Simple Group registration, so you can calculate the number of registrants and keep track for capacity.

Fields...

Registration Type: Individuals or Family (2 Adults + 1 or more Children)
- no fee associated with "Individuals" but $55 associated with "Family"

2 Conditional Fields, which are conditional on the "Individual" value of the previous field...

Number of Adults: 0, 1, 2, 3, etc
- set as dropdown field
- assign fees to each value

Number of Children: 0, 1, 2, 3, etc
- set as dropdown field
- assign fees to each value

That should do the trick!