Quasi-related but I did the same thing at RadioShack for inventory. It was a long process of scanning each product, looking at the scanner and manually verifying the price on the tag.

The tags had a barcode on the back with the SKU and the price that had been printed, but naturally the scanner didn't support that format.

So I brought in my own scanner, scanned all of those into a spreadsheet, then ran a script that checked the same inventory panel that had the updated prices, and printed out a new sheet with just the barcodes that differed to run "inventory" against. Saved us hours per day.

Corporate got pissed (understandably) and shut it down real quick.