texas instruments TI-89, TI-92 Important information
Finance Application for the
TI-89 / TI-92 Plus
Important Information 2
Where to Find Installation Instructions 3
The Time-Value-of-Money (TVM) Solver 4
Editing Values in the TVM Solver 5
Calculating TVM Outside of the TVM Solver 6
Finance Functions 7
Calculating Cash Flows 8
Calculating Amortization 9
Calculating Interest Conversion 9
Finding Days between Dates 10
Defining Payment Method 10
Finance Examples 11
Example 1 — Financing a Car 11
Example 2 — Calculating Interest on a Fixed Payment 12
Example 3: — Amortization 13
Error Messages 15
Error Recovery Instructions 16
Miscellaneous 17
How to Contact Customer Support 18
Finance Application for the TI-89 / TI-92 Plus 1
Important Information
Texas Instruments makes no warranty, either expressed or implied, including but not limited
to any implied warranties of merchantability and fitness for a particular purpose, regarding
any programs or book materials and makes such materials available solely on an “as-is” basis.
In no event shall Texas Instruments be liable to anyone for special, collateral, incidental, or
consequential damages in connection with or arising out of the purchase or use of these
materials, and the sole and exclusive liability of Texas Instruments, regardless of the form of
action, shall not exceed the purchase price of this product. Moreover, Texas Instruments shall
not be liable for any claim of any kind whatsoever against the use of these materials by any
other party.
© 2000 Texas Instruments Incorporated
TINGRAPH LINK and TI-Cares are trademarks of Texas Instruments Incorporated.
Finance Application for the TI-89 à TI-92 Plus 2
Where to Find Installation Instructions
For detailed instructions on installing this and other Flash applications, point your web
browser to:
http://www.ti.com/calc/docs/guides.htm
Installing this application requires TI-GRAPH LINKé. To download a free copy of
TI-GRAPH LINK for the TI-89 / TI-92 Plus, Point your web browser to:
http://www.ti.com/calc/docs/link.htm
Finance Application for the TI-89 / TI-92 Plus 3
The Time-Value-of-Money (TVM) Solver
Use Time-Value-of-Money (
) functions to analyze financial instruments such as annuities,
TVM
loans, mortgages, leases, and savings.
The
TVM Solver
displays the time-value-of-money (
values, the
To access the variables outside the
Finance folder. Note: Exit the
variables. Otherwise, the variable currently highlighted by the cursor in the
not display in the
screen automatically displays when you run the Finance application. It
TVM Solver
VAR-LINK
) variables:
TVM
solves for the fifth variable.
editor, press 2
TVM
TVM Solver
, and then press 2
variable list.
, æ, PV,
Ú
PMT, FV
°
°
. Given four variable
. They are located in the
to display the
TVM Solver
TVM
will
Press C and D to move the cursor between variables. After entering a new value, press D or
to save it. To solve for the unknown variable, press „
¸
Note: The
VAR-LINK
Finance folder (where
variables are stored) is used by this
TVM
Compute
or ¥
¸
.
application and previously-stored data can be overwritten without notification. Avoid using
this folder for storing personal data.
TVM variables Default Definition Value Type
N0
I0
PV 0
PMT 0
FV 0
PpY 1
CpY 1
END
BEGIN
END
Number of payment periods real number
Annual interest rate (converted to a per-period
rate based on the values of
PpY
and
CpY
)
real number
Present value real number
Payment amount real number
Future value real number
Payments per year integer > 0
Compounding periods per year integer > 0
Set annuity due (i.e. specify whether payment is
N/A
at the end or beginning of each period)
When you store a value to
to the same value. To store a unique value to
have stored a value to
does not change.
CpY
PpY
in the
PpY
TVM Solver
CpY
. If you store a value to
only, the value for
automatically changes
CpY
, you must store the value to
PpY
outside
the
TVM Solver
after you
CpY
, the value for
Note: Enter cash inflows as positive numbers, and cash outflows as negative numbers.
To solve for an unknown
1. Press
Finance Application for the TI-89 à TI-92 Plus 4
O ¸
TVM Solver.
Highlight
press
Finance
¸
to display the
with cursor and
.
variable, follow these steps.
TVM
Default
(ƒ
TVM
8:Clear Editor
values.
)
2.
Enter the known values for
and FV. Press D or
PV
save each new value.
¸
N, I%
to
,
3.
Enter a value for
PpY
, which
automatically enters the same
value for
unique value for
4.
Select
END
CpY
or
; if
PpY
CpY
BEGIN
ƒ
CpY
.
to specify the
payment method by highlighting
the option with the cursor and
pressing
5.
Place the cursor on the
¸
.
TVM
variable for which you want to
solve (i.e.
6.
Press „
).
PMT
Compute
. The answer is
computed and displayed and stored
to the appropriate
variable. An
TVM
indicator calculator in the left
column designates the solution
variable.
, enter a
Editing Values in the TVM Solver
The following calculator editing keys are available in the TVM Solver. For more detailed
explanation, see the TI-89 / TI-92 Plus Guidebook.
Cursors: C, D, A, and
Deletion options: 0, ¥ 0, ƒ
Insertion: 2
Clear options:
/
M, ƒ
The ƒ Toolbar
The ƒ Toolbar functions are exactly like the ƒ Toolbar on the TI-89 and TI-92 Plus on the
Home screen. You can
is placed on the calculator clipboard for use either within or outside the application.
inserts the contents of the clipboard at the current cursor location (both within or outside the
application).
4: Cut is not the same as 7: Delete. When you delete information, it is not placed in the
clipboard and cannot be retrieved.
B
7:Delete
8:Clear Editor
Cut, Copy, and Paste information within the TVM Solver. All information
Paste
Finance Application for the TI-89 / TI-92 Plus 5
To clear all
variable values and reset all options to their defaults, select
TVM
8:Clear Editor
.
To find out the application software version of the application, select
to close the screen.
¸
Calculating TVM Outside of the TVM Solver
All
TVM
Function calculations outside the
value to a
Access a
name and
Note: The
application and previously-stored data can be overwritten without notification. Avoid using
this folder for storing personal data.
If you enter less than six arguments, the calculator substitutes the currently stored
variable value for each unspecified argument. If you enter any arguments with a
you must place the argument or arguments in parentheses, separated by commas (b).
tvm_N
and finance functions are listed in the
TVM
function takes zero up to six arguments.
TVM Solver
variable use the following syntax:
TVM
§
value
TVM_variable
finance\
VAR-LINK
precedes a variable name when pasted outside the
TVM_variable
from the
Finance folder (where
¸
VAR-LINK
½
do NOT save the results in memory. To
menu,
variables are stored) is used by this
TVM
for use outside of the
Finance
folder.
TIFnance
A: About
. Press N or
TVM Solver
precedes a function
TVM Solver
.
TVM
TVM
. Each
a
save
function,
§
Use
to save the
new result for i in
The
tvm_N(
tvm_I
The
tvm_I(
memory.
function calculates the number of payment periods.
tvm_N
I,PV,PMT,FV,PPY,CPY
function calculates the interest rate per year.
tvm_I
N,PV,PMT,FV,PPY,CPY
)
)
is now the
I%
new rate.
Function calculations
do not save results in
memory.
Finance Application for the TI-89 à TI-92 Plus 6
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