[AccessD] Building A Product Costing Database

To all,
I am sure that I have seen something similar discussed on this list before but for some reason I can't access the archives !!!!....Anyway I am looking at building a production database (in the first instance for a paint company).....It will have to start from the very raw materials right through to the end product and produces costs, has anyone done something similar before that I could possibly have a look at (don't want code etc, just want to get the basic understanding of how something like this should work).

The database would have to produce costs at every stage as they will in some instances use a completed product which they have in stock to mix in with other raw materials to produce another type/colour of paint etc.

Thanks in advance for any help.

Paul Hartland