Simple Math Question

[muttrox]

What if you get 11 cases? Reminds me of Tippy Turtle.

Tippi Turtle: Hi, everybody! Well, enough small talk - we’ve got people to annoy! Today, we’re gonna bother these guys - the hammerheads at the U.S. Post Office. Hee hee hee! Now, pay attention.

[ Tippi demonstrates in his home workshop ]

Get some real thin balsa wood, and glue it together like this. See? You make a little box! Then, you take a helium balloon and you put it inside like this. Then, wrap it up and address it! Take it downtown.

[ show Tippi Turtle standing in line at the Post Office ]

Hee hee hee! This is gonna be great! [ jumps excitedly ]

Postal Employee: Next.

Tippi Turtle: Yes. Good afternoon, Mr. United States Post Office Man. Now, you charge according to weight, is that correct?

Postal Employee: Yeah, yeah, yeah, just put it on the scale.

Tippi Turtle: Okee-dokee! [ places his box on the scale, but it floats upward ] Looks like you owe me some money, hammerhead!