What does the "5% overage" option mean?

In flooring, we typically will suggest to our customers to order more flooring than is needed due to the fact that no room is truly square and cuts will need to be made. Since humans are the ones installing the flooring, mistakes can be made, so this overage can ensure that you have a few extra tiles on hand if a mistake while cutting were to occur. This overage is optional, so it is up to the customer if they would like to go with it or not.