I have a question I don't have the answer for. My feed box at the coop at this time is just one open box. I want to petition it so one square will hold layer feed, one scratch and hopefully the rest for the misc stuff. My question is what is the math for figuring how wide it needs to be if the container is 14 inches high and 14 inches deep. How wide do I need to make so it will hold a fifty pounds of feed? Any idea?