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Two questions

1. If customers are scanning their own goods, doesn't that make it likely they will occasionally, for one reason or another, miss a scan? That's huge for Walmart's margins. $15 total expense per hour labor saved is not that huge a savings.

2. How does this work with items sold by weight? Have they installed new scales that can allow you to select the item weighed create a barcode for the price of that weight of that item?

All the self checkouts Ive seen have scales built in both the scanner and where they set the items