HP 20B - Manual (Page 33)

Time Value of Money
33
Table 3-2 TVM Example
Keys Display Description
M Returns the monthly payment. This result is negative (-); it is
money you pay out.
To reset the TVM variables to their default values, with any TVM variable displayed press
:x
. Press
<
or
>
repeatedly until TVM displays. Press
I
to reset the TVM values, or press
O
to cancel.
Amortization
Refer to Figure 2 for a menu map of the Amortization menu (Amort). Table 3-3 lists the keys and variables of the Amortization
menu. To open the menu, press
A
. The Amortization menu calculations are based on values stored in the following TVM
registers:
N
,
Y
,
V
,
M
and
[
.
To enter values for the TVM variables, enter a number followed by the corresponding key.
For an amortization example, see Table 3-4.
Figure 2 The Menu Map for the Amortization Menu
Table 3-3 Amortization Menu Items
Menu Item/Key Description
A Opens the Amortization menu .
Nb Period Number of periods to group together in the amortization calculation. The default value is
the number of payments per year defined by the
[
key.
Start Period on which to start amortization. Default is 1. If you want to amortize for the second
year with 12 payments per year, enter 13 (the second year starts at the 13 th payment
with 12 payments per year).
Balance The loan balance at the end of the assigned amortized period.
Principal Amount of the loan payment applied to the principal at the end of the amortized period.
Interest Amount of the loan payment applied to the interest at the end of the amortized period.