Hey Tom,
Another thing you should look into, Which is a great tool when computing TVM, (TIME VALUE of MONEY), is the rule of 72. There are other number rules such as the rule of 70, and the rule of 69 and 69.3.... But the Rule of 72 is best used for yearly compunding of interest.
The Rule of 72 simply states that 72 divided by an interest rate equals the number of coumpounds needed to double the principle. I'll give you an example...
50K mortgage @ 7.2% will cost *about 100K over 10 years. (simple interest)
72/7.2=10 compounds (years in this case)
But if you got a lower interest, say, 3.6%, it would take 20 years for the same 50k to cost 100K.
72/3.6=20
Now the numbers are not "hard" or "exact" but they are fast...
And when your using money manipulation when negotiating, odds are that the other guy doesnt understand the value of compounding, atleast the way you do now. You are able to "throw" numbers around and make the guy think he's taking advantage of you... When in reality, you know the underlying concept that he doesnt.
:superman:
Dustin
p.s. when they said that knowledge is power, they weren't lying! Though this is a great resource to have, success comes from resourcefulness and your choice to create opportunity.