I couldn't count the times I had to correct a cashier when a price rang up wrong. I remember most of the prices as I pick things up, and watch the readout when they're checked.
I've missed things too, and immediately went to the customer service desk to get the 15 cents I was overcharged. LOL
Yep, that's me, too. I once called over a self-checkout "manager" at
WalMart because something that I bought rang up for $1.25 instead of $1.00 on the shelf. The young lady looked at me with like "you're complaining to me about 25 cents!" So, I asked her, does
WalMart add a 25% markup on all their items at the checkout, or just what I buy?

I think my comment went right over the young woman's head. Anyways, I made her call a manager over to the checkout station to do a manual override while I held up everyone in line behind me. To make it even better, the manager said it would take time to verify the price on the shelf. To which I replied, "that's OK, I can wait and I'm sure everyone behind me waiting in line won't be bothered at all while you verify you overcharged me."


One day I was at Home Depot's customer service desk trying to buy an item. I'm a veteran, and Home Depot gives us a 10% discount on most, but not all, products. We veterans used to just show the clerk our Veteran's ID and they would punch in the code for the military discount. Well, Home Depot decided that they had to move everything to smart phone apps - not my strong point, I admit. But you use the smartphone with their app and it gives you a QR code on the smartphone to scan. Well, the internet in the store was so slow that my military discount QR code was not loading. I showed the lady my Veteran's ID and asked if she could just manually enter it for my purchase. She said she could not. OK, fine, the game was on. I kept on entering the info for my QR code for over 10 minutes as the line behind me started to grow and grow. I refused to step aside and let anyone else take my place. After 15 minutes of no success with the store's slow internet connection and no QR code coming up on my app, the customer service lady finally entered in the override code herself because the line was about 6 people long and it was looking bad for her. So, I got my military discount on the purchase and went out to my car. However, I decided that situation was completely uncalled for. I went back into the store, talked to a manager about my interaction at the customer service desk and the difficulty getting a QR code for my discount, and said that they could have entered the override code at the start if they had wanted to do it, because they certainly could do it after 15 minutes and lining people up backed up into the plumbing department. The manager agreed. I was in Home Depot last week, and my military QR code was not scanning, and a young man came over, scanned a code he had attached to his vest, and immediately I got my military discount and was out the door. I like to think my conversation with the manger had something to do with the improvements.
To make this somewhat related to gardening, I buy lots of my tools and gardening supplies from Home Depot - always taking advantage of my military discount!