A guy goes into a convenience store and asks the clerk for a pack of cigarettes. The clerk says, "We don't have cigarettes."
The guy says, "No cigarettes?? I can't believe that!"
He looks around and notices that every shelf is filled with salt... bags of salt, boxes of salt, even little packets of salt. There is nothing else in the store but salt. He says, "Oh, I see... It looks like you really sell salt."
"No," the clerk says, "I don't sell much salt, but there was a salesman here last week... Now _HE_could really sell salt!"