If the situations seem funny and invraissemblables, yet they are genuine. Rather than cry, Anna Sam preferred to laugh (and with great cynicism elsewhere) and the result is striking and gives the reader a very distracting when the fuse crazy laughter.
Funny, light and pleasant to read. Why miss out?
However, it seems clear that this book is aimed, above all, to all cashiers who clearly find it. Moreover, the author speaks to cashier (s).