You can--there are softwares available.
However, I used a simplified method--if the same amount each month, I count all the money as 6 months in the moket, or 1/2 of the money in 12 months. IRA money was adjusted by how long it has been in the maket.
I am ready to send my 2008 IRA out--10K next year for my LP and myself. This might be my last IRA contribution for next 4 years--daughter's tuition has to be 1st.:(.
