I am trying to improve my joke writing skills. I think the following punch line is funny if we suppose that "cat scan" refers to an actual cat scanning instead of a computer tomograph and "lab report" refers to an actual labrador reporting instead of a laboratory. Can you write the setup? --- The vet shrugged, "I'm sorry. If you had just taken my word for it, the bill would have been $50, but with the Lab Report and the Cat Scan, it's now $1500."