Quotas on age range equation from age question - by: dgalloway

Hi,

I'm trying to do the following.

question 1: what is your age?
question code: SCREENC
type: numerical input

question 2: age ranges
code: SCREENC1
type: List question?

Trying to code question 1 into the following age ranges

1 Under 18
2 18 - 24
3 25 – 29
4 30 – 34
5 35 – 44
6 45 – 49
7 50 – 54
8 55+

I've put together this formula which i stuck in the question field on question 2

{SCREENC1=if(SCREENC.NAOK <= 18, "1", if(SCREENC.NAOK < 25, "2", if(SCREENC.NAOK < 29, "3" ,if(SCREENC.NAOK < 34, "4", if(SCREENC.NAOK < 44, "5", if(SCREENC.NAOK < 49, "6", if(SCREENC.NAOK < 54, "7" ,if(SCREENC.NAOK > 55, "8"))))))))}

I also need to set quotas on these age ranges so I don't think it can be an equation question. My formula doesn't seem to work, i get no answers in the 2nd question when i run it. What am I doing wrong? is there a better way to do this?