Krusty Krab cash register (also called Cashy and  Betsy ) is a cash register and the co-owner of the  Krusty Krab. It first appears in the episode " Help Wanted."
It is a slate-gray or dark blue cash register. Its sole purpose is to store
money given by customers at the Krusty Krab.
Role in series
Mr. Krabs names it Cashy while he is stuck in the ocean by himself. The Flying Dutchman taters to take it away from him, but the thug war ends in Cashy being lunched into the air. It hits Sandy's heilcopter, causing to hit the Flying Dutchman, knocking him out and later crashing into the Goo Lagoon sands.
Mr. Krabs calls it Cashy once again when it is set alight by fire.
Mr. Krabs calls it Cashy again when the
giant Krabby Patty swallows it whole.
It has been damaged many times, mostly by explosions.
" Squid's Day Off:" It is knocked over by Squidward, causing all of the money inside of it to spill out.
" The Incredible Shrinking Sponge:" Squidward uses the cash register to try and squish a sea urchin, before he gets his head stuck in it.
" ChefBob:" SpongeBob slams ChefBob in it numerous times to try to destroy the puppet and get it off his hand.
Its name is Betsy in the German version, the name of Mr. Krabs' mother. It is also called Betsy in the Spanish version.
Its name is Kassie in Dutch.
Mr. Krabs got it when it was just a little calculator and raised it as if it was his own child .
 Mr. Krabs refers to this technology as an automated money-handling system in " Krusty Krab Training Video."