A blind man stood by the station every day selling matches for 20p from a tray. A man used to come out of the station each morning and put 20p on the tray but never used to take the matches. One morning he drops 20p on the tray as usual, and as he walks away the blind man shouted: "Excuse me! But are you the man that always puts 20p on my tray but doesn't take any matches" The man said, "Yes, that's me". The blind man said, "I think you should know that they went up to 30p last week".