Once an old man was standing in rain with a book in his hand for sale. A man came to him and asked for buying the book. he sold the book for $30 and said, "Don't open the last page of the book! Else you would face problem!
Man finished reading all the pages with great fear but not the last page. Out of curiosity he opened the last page one day. Then he was shocked to see MRP: $3.
