A grocery store cashier has a high-pressure job. Their performance is often measured by their “items per minute” scanning speed. Any item that breaks their rhythm can be a source of major frustration. While there are many annoying products, there is one item that almost every grocery worker dreads seeing. It is not heavy, and it is not messy. It is a simple greeting card. This seemingly innocent item is one of the most difficult and the most time-consuming things to scan in the entire store.
