There's a really simple method to take care of this and avoid wasting the court's time.

Raise the issue with store management. (The complaintant was offered the money back....most stores will correct the inventory tag rapidly, problem solved)

Give them time to fix the issue.

If, after time, the issue hasn't been fixed, drive it up the food chain to higher.

If your answer from the store HQ isn't satisfactory, contact your state consumer protection branch and let them take care of it.

If you're still upset about it there's a REALLY simple solution which doesn't involve wasting the time of a court...........don't shop there anymore!

WalMart isn't getting rich from pricing errors, if anything, the ill will they create with consumers makes them lose business. Inventories in a modern store like WalMart involves thousands of SKUs, it's REALLY easy to make a mistake given the volume of items.