texas instruments TI-89, TI-92 Important information

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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.

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,

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.

)

Enter the known values for

and FV. Press D or

save each new value.

N, I%

Enter a value for

PpY

, which automatically enters the same value for unique value for

Select

END

CpY

; if

PpY CpY

BEGIN

CpY

to specify the payment method by highlighting the option with the cursor and pressing

Place the cursor on the

TVM

variable for which you want to solve (i.e.

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.

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

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

. Each

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

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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