Self-service shopping

We live very close to a shopping center where they offer self-service shopping. You get a scanner, scan your products and pay at the register based on what you scanned. Yeah: they do trust you to scan all the products in your trolley. About as far as they can throw you. So they do 'spot checks' where they randomly pick you to scan a number of items to check if you scanned them. But you have to wonder how random it is, when you get picked every single Friday night. Every Friday evening we do s...
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