We are using aMember as a billing system for a dental office offering dental plans. The base plan is $19.95/mo and $10/mo for each child. How can I set it up in aMember so that the user must first select the $19.95 plan AND then have some way of allowing the customer to specify how many children they want to add to their plan and have it add $10/child to the recurring total? Further, is it possible to have dynamic fields so that for each child they add they have to provide a name or other info for that child? Please advise!