I am creating a form to sign up members to a summer camp. I have set up a repeating section, so if parents have more then one child attending they don't have to start from scratch. My problem is that it cost $60 for the first kid and $30 for each additional kid. I know I can do a drop down menu to ask the cost for each kid, but I rather it automatically calculate the costs to eliminate errors.
I can't figure how to do a conditional to know that "camper 1" has been added ($60) and to only charge $30 each for additional camper ie "camper 2" , "camper 3" etc. The cost should be $120 for three campers.