The manager of a small agricultural machinery manufacturer interviews a free sales representative: "How can you prove to me that you really are a first-class agricultural equipment vendor?"

"Well", says the freelance salesman, "for example, last week, I could sell, a modern milking machine to a poor farmer with only one cow ". The manager can hardly believe that and asks how a poor farmer can finance a milking machine. - "That was very easy!" triumphs the salesman, "I took his cow as a first installment."