He priced a 50lb bag of brown rice. I wonder, could you eat that much brown rice before it started to go bad? (Brown rice keeps less than a year; a quick web search says about six months.) You'd have to eat over a quarter pound (uncooked dry weight) per day every day to finish a bag in six months.
Maybe he didn't take that into account. I doubt that he's eating that much rice every day. On the other hand, if you are cooking for more than one person you might be able to go through the bag in less that six months.
