If you like to crunch #s then could you please help me out? I'm trying to plan for retirement.?

If starting at the end of Jan 2010 I invest $300 regularly at the end of every month in a retirement acct and it grows at an annual rate of 8% compounded monthly and my retirement is set for 1-1-2055 (which makes the last payment fall at the end of 12/2054 - and won't have time to accrue interest then) how much will be in my account when I retire?