[Tickner]

It's all related to the future value of your money....

FV($8000, 3 year, 50% interest) = 8000*(1.5)^3 = $27,000

The $500/month annuity is valued at:

FVAF($500/month, 36 months, %50/36 interest rate) =

(((1 + .5/12)^36 - 1) / .5/12)($500)

= $40169.52

so you end up with $67169.52

Thats the real anwser. Your teacher however is probably going to want to see something like this...

Year 1
---------
$8000 + $6000 = $14000 + 50% = $21000

Year 2
--------
$21000 + $6000 = $27000 + 50% = $40,500

Year 3
-------
$40,500 + $6000 = $46,500 + 50% = $69750


So, thank me for doing your home work by sending $10 to "Tickner" on pokerstars.