If you're talking about the Costco product audits, the training materials said when you're doing your first audit, you can expect to spend a full 8 hours there scanning. Then, supposedly, you get used to the app and can complete the audit in 4 or 5 hours. But you have to scan so many items, without being noticed, and I've read on other forums and reddit that some people are getting kicked out when they're discovered. Because it's basically impossible to scan hundreds of items for hours straight without looking suspicious.