This isn't a lesson on CAO, just an FYI. But for one thing the CAO layout will tend to change. But if you really want to learn CAO or you need to, talk with your grocery manager. They seem to be the most knowledgeable about CAO in the entire store. I mean they know just about everything if not everything about CAO. If there is anyone who could teach you, it is them. Because it is their job. CAO can be a tricky thing to learn, a lot of abbreviations may not make sense, etc. But at least now you know a good way to learn it. Just thought everyone should know that.