I have been putting off getting into the mode of checking prices like I should at the grocery store. I have been doing figures in my head, but one tool that makes my life easier is a calculator. I take it to the store with me to find the real price per cup, pound, ounce, or other measurement.
I know that some stores have per unit pricing on the shelf label, but sometimes that label is missing or it's not broken down the way that's useful for me. So I take my own calculator and figure it out right there in the store aisle.
Yesterday I bought a calculator that will fit in my wallet and planner to make my life easier. I plan to start writing prices down into a price book. Since moving back about 5 weeks ago, I've realized that I need to get on the ball with this. I plan to write more about the price book soon.
Getting the "real" price with a calculator can be valuable to see if you are really saving money. It may not always seem like much, but it adds up over time.