Below is a link to farmtownfreegifts.freeforums.org
This site has tons of useful information as well as being a free gift site.
The link here will take you directly to the page on this site that lists every single USABLE ingredient, product, etc. How many batches are needed to fill a facility once per day, what it makes, which product it makes, which facility it is used in.
You do not have to register to view all the information or collect gifts.