My wife always comments that its always cheaper when I do the grocery shopping. I do compare prices (and accomplish it in a quarter of the amount of time that it takes her).
Some prices I just know off the top of my head as well as which stores in our neighborhood have certain items at the best prices.
For instance, I will not buy Chef-Boy-Ar-Dee (spelling?) unless it is a buck or less (the kids like it). Same with Kraft Dinner (you can do much better during case lot sales).
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