On his weekly visit to the general store in a small Idaho town, a farmer asked the grizzled proprietor for some dynamite to blast a few stumps from his fields. As the old-timer was getting the dynamite from the shelf, the farmer asked if he could have it put on his bill.
“Well, friend,” the proprietor said, “have you ever use this stuff before?
“Why no, this will be the first time,” the farmer replied.
“Then,” said the old-timer, “I’m afraid I’ll have to ask you to pay cash.”