The Finance Aplet - HP 39gs Master Manual

T F
T F
H E I N A N C E
H E I N A N C E
This aplet is designed to allow users to solve time-value-of-money (TVM) and amortization style problems
quickly and easily, as well as ordinary compound interest problems.
Compound interest problems involve bank accounts, mortgages and similar situations where "money earns
money". TVM problems involve the use of the idea that the value of money changes with time - a dollar today
is worth more than the same dollar some years from now. For example, that a dollar invested today can
generate more money than the same dollar invested later.
The calculator manual contains a lengthier explanation including cash flow diagrams for those who need it, as
does any high school or college textbook.
When you the aplet you will see the initial view shown right.
Pressing , or
SYMB NUM
it is quite limited and only has the one view, consisting of two related pages.
Parameters
There are a number of parameters or variables which must be either supplied or solved for. These are:
-
N
-
Mode
-
P/YR
-
I%YR
-
PV
A
A
P L E T
P L E T
will make no difference to this aplet as
PLOT
The total number of compounding payments or payments.
This has the value of
Beg
relative to the compounding periods - at the beginning or the end.
The number of payments per year.
The nominal interest rate or investment rate per year. This is then divided by
to find the nominal interest per compounding period. This is the rate actually used in
the internal calculations.
This is the present value of the initial flow of cash. In a loan, this is the amount of the
loan. In an investment, the amount invested.
the first period, however long that may be.
(inning) or depending on when payments occur
End
PV
155
is always the amount at the start of
26
P/YR