These could be a little bit boring.
However, when you are trying to get the most food for the least price I'm working hard to figure out a framework that is useful. I figure 2000 calories (what a person needs daily) is a good way to calculate whether something is cheap or expensive.
If you can figure out a better way to do it let me know :)
But this goes back to the "Eating for $1/day" post I made long ago. Side note: All prices are in Canadian dollars so about 1000:1 Naira to CAD.