Well lets absorb the info we have here and what we know:
Compounded periodically -> A= P(1+(r/n))^(nt)
Compunded monthly -> n=12
Already owed $8000 -> P=8000
$9500 means the end of the line for Donald -> A=9500
24% interest -> r=.24
Just use the info here to figure it out...
Anymore questions? Just ask!