If you’ve shopped at Aldi, the German-based grocery that’s expanding around the U.S., then you know their shopping cart system. You insert a quarter into the cart handle to unlock the chain attached to the next cart. When you return the cart, you can retrieve your quarter. I love this system. For one thing, it’s efficient. People don’t leave carts strewn around the lot, so the company doesn’t have to hire employees to retrieve them. That’s one reason it can sell a large bag of tortilla chips for under two bucks and a half gallon … Continue reading For the Sake of a Quarter by Gayla Mills →