"Always Wal- Mart" joke

A woman goes into Wal- Mart to buy a rod and reel. She doesn't know which one to get so she just grabs one and goes over to the cash register . A Wal - Mart associate is standing there with dark shades on.
She says," Excuse me, sir, can you tell me any thing about this rod and reel?"
He says, "Ma'am, I'm blind but if you drop it on the counter I can tell you everthing about it from the sound it makes."
She doesn't believe him, but drops it on the counter anyway.
He says, "The rod and reel is $20."
She says," That's amazing that you can tell all that just by the sound of it dropping on the counter. I think it's what I'm looking for so I'll take it."
He walks behind the counter to the register. Just then, the woman farts. At first she is embarrassed but then realizes that there is no way he could tell it was her; being blind he wouldn't know that she was the only person around.
He rings up the sale and says,"That will be $25.50."
"But didn't you say it was $20.00?"
"Yes, ma'am. The rod and reel is $ 20.00,
the duck call is $3.00, and the catfish stink bait is $2.50."