A man goes into a hardware store. He asks the clerk 'How much is 6?' Which the clerk responds with '6 is $0.50.' 'How much is 60?' The man asks. '$1.00.' Answers the clerk. 'Okay, I will take 600.' Says the man. 'That will be $1.50, please!' Says the clerk. The man pays and leaves. What did the man buy? -Riddles