In 2012 Uriah Stone received the following interest payments:
• Interest of $400 on refund of federal income tax for 2010.
• Interest of $300 on award for personal injuries sustained in an automobile accident during 2009.
• Interest of $1,500 on municipal bonds.
• Interest of $1,000 on United States savings bonds (Series HH).
What amount, if any, should Stone report as interest income on his 2012 tax return?