Hey guys,

I didn't really know where else to pose this question, but...

Let's say you've got

amt inc

5000 38

10000 29

So if you have 5000, you'd use 38. If you had 10000, you'd use 29.

Now I have a table of these pairs, in ascending order on amt for every 5000. (ie. 5000, 10000, 15000, 20000, ....).

The problem I'm facing is that if I have, say, 6000, I don't have a matching 'inc'. Now I can't use 38, or 29, but I have to use something in between. But that something has to be proportionate if 'amt' is 5500 or 8900.

I hope that makes sense so far.

Now I think this has something to do with numerical analysis, but I really just can't remember what or how to do this!

If anyone can help, I'd really appreciate it. If you require more information, just ask.

Thanks,

Sadiq.