Joke: Blonde Robbery-Fool joke

A red-head, a brunette and a blonde perform a Post Office robbery. They are on the run from the police and they have to ditch their car and go cross country. 

They are all getting tired and happen across an old farm with a huge barn. Sneaking inside the barn, they see three old flour sacks. They all hide in separate sacks. 

The police enter the barn and upon seeing the sacks, kick the first one containing the redhead. The redhead says "Woof!". 

"Nothing in here but a dog sarge" says the constable. "We'd better move on". 

They kick the sack containing the brunette. "Miaow!" she says. 

"Nothing in here but a cat, sarge. Better move on". 

They kick the sack containing the blonde and the blonde says "Potatoes!"