The authors of this book could not make up their minds "should this be a joke or serious book" their choice was to make serious subjects into a joke and thus made a truly worthless book. It got to the point where I was so upset at having to read 6th grade jokes (sorry 6th graders, you are probably much more clever) that any information was lost. You can learn as more about the import/export business by going to the store and reading shipping labels.