Now this is pretty interesting. Walmart has just launched a very cool receipt comparison tool you can use. If you buy your groceries somewhere and send them a pic of your receipt, they will tell you how much you would have saved at Walmart.
This is pretty cool, I wonder if it will become popular. Upload your pic to this page and see what they say!
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Grocery Shop For Free at The Mart via Facebook says
If it WILL work out. My brain and typing fingers don’t work at the same speed.