I like the post! Well organized, well thought out.
Although perhaps your calculations are a bit off, quoting a few prices from this board
here.Wheat is valued at .50 each, and can be sold as bread.
Cocoa beans are valued at .60 each and can be sold directly.
This would make a batch of cookies valued at a minimum of 1.60 per 8 cookies.
But, in any case to wrap this up, I'm afraid we've decided that adding cookies to the shops wouldn't really have any worthwhile effect considering that you can already sell bread and cocoa beans individually without having to craft it.
However, if enough people wish it and respond to this post asking for cookies we'll go to the effort and add them into server shops at .20 each. Which would make them equal to their normal price of bread and cocoa beans.
Have fun.