I am an Excel geek myself! (Having been a healthcare finance person for most of my career, with an accounting degree as well.)
This is awesome data, but I agree the non-consumables cost should be spread out over at least 6 months to a year. Nonetheless, your spreadsheet is great! I'm one of those folks who haven't yet gotten into hatching/brooding - I'd rather buy a very young pullet that I can integrate fairly quickly into my flock. So it's very interesting to me to see the cost of raising one. This is a great reference for the future.
Thanks for sharing it with us.