Stressed and penniless after months of day trading, Mr. Jones decides to invest his savings into a conservative growth mutual fund. He plans to retire in 30 years and wants to make annual deposits into his IRA in order to accumulate a sum of $450,000 at the end of the 30 years. Mr. Jones expects to earn 10% per year, on average, in his mutual fund. What should be the amount of Jones' annual contributions ?