Handspring Treo 90 Handheld User Guide

Chapter 6Page 121
Trigonometry buttons
Finance buttons
Finance buttons enable you to find an unknown variable value based on a group of known variable 
values. For example, to calculate the monthly payment for a 30-year home loan of $100,000 with 
an annual interest rate of 8%, you would enter the following variables:
nPayments/year = 12
nN = 360 (30 years x 12 months)
nAPR = 8
nPV = 100,000
nFV = 0
Using these variables, the answer would be -733.76 per month.
To solve this example:
1. Enter a value and...

Page 122 Application-Specific Tasks
nPV = 100,000
nFV = 0
2. Enter 12 and tap the P/Yr button to enter the number of payments per year.
3. Tap Edit.
4. Tap the Pmt line and erase all values on the line including zero.
5. Tap Solve.
6. Hold Option   and press Return   to finish.
You can use a similar process to solve other financial equations by entering four of the variables 
to find the value of the fifth variable.
Stores the current number as the total number of payments over the life of the 
loan....

Chapter 6Page 123
Logic buttons
Statistics buttons
Shifts the value to the left and fills the new places with zeros.
Enters D in a hexadecimal calculation.
Enters E in a hexadecimal calculation.
Enters F in a hexadecimal calculation.
Calculates bit-by-bit commonalities between two arguments.
Calculates bit-by-bit unique occurrences in two arguments.
Shifts the sign bit to the right in signed mode.
Enters A in a hexadecimal calculation.
Enters B in a hexadecimal calculation.
Enters C in a hexadecimal...

Page 124 Application-Specific Tasks
Weight/Temp buttons
Length buttons
Generates a random number between 0 and 32767 and then divides this number 
by 32768 to generate a random fraction between 0 and .99997.
Returns the number of combinations of 
n items taken m at a time.
Returns the number of permutations of 
n items taken m at a time.
Indicates the current value is entered in ounces. When you tap this button after 
tapping another unit of measure, it converts the value to ounces.
Indicates the current...

Chapter 6Page 125
Area buttons
Indicates the current value is entered in nautical miles. When you tap this button 
after tapping another unit of measure, it converts the value to nautical miles.
Indicates the current value is entered in millimeters. When you tap this button after 
tapping another unit of measure, it converts the value to millimeters.
Indicates the current value is entered in centimeters. When you tap this button 
after tapping another unit of measure, it converts the value to...

Page 126 Application-Specific Tasks
Volume buttons
Creating a custom view
You can modify any existing Advanced Calculator view to create your own view. While 
customizing a view, you can change the button names as well as the button definitions.
To create a custom view:
1. From the Advanced Calculator screen, press Menu  .
2. Under Program, select Export (/E).
3. Tap the pick list and select the view you want to modify.
4. Tap Export.
5. Hold Option   and press Return   twice. 
6. In Memo Pad, open the...

Chapter 6Page 127
8. From the Advanced Calculator screen, press Menu  .
9. Under Program, select Import (/I).
10. Tap the pick list and select the view you modified.
11. Tap Import.
12. Tap Replace to change an existing definition, or tap Add to create an additional definition.
13. Hold Option   and press Return   twice to finish.
Calculator menus
Calculator menus are shown here for your reference, and Calculator features that are not 
explained elsewhere in this guide are described here. See page 33 for...

Page 128 Application-Specific Tasks
Expense
Expense enables you to record the date, expense type, and the amount that you spent. A record 
in Expense is called an “item.” You can sort your Expense items into categories or add other 
information that you want to associate with the item.
To create an Expense item:
1. Press Option   and then press Menu   to access the Applications Launcher. 
2. Tap the Expense icon  .
3. Enter the amount of the expense. 
4. Tap the Expense type pick list and select a type...

Chapter 6Page 129
To change the date of an Expense item:
1. Tap the Expense item you want to change.
2. Tap the date of the selected item. 
3. Select the new date.
4. Hold Option   and press Return   to finish.
Entering receipt details
Expense provides a variety of options that you can associate with an item. These options appear 
in the Receipt Details dialog box.
To open the Receipt Details dialog box:
1. Tap the Expense item to which you want to assign details.
2. Tap Details.
 
3. Select any of the...

Page 130 Application-Specific Tasks
4. Hold Option   and press Return   to finish.
Customizing the Currency pick list
You can select the currencies and symbols that appear in the Currency pick list.
To customize the Currency pick list:
1. In the Receipt Details dialog box, tap the Currency pick list and select Edit currencies.
2. Tap each Currency pick list and select the country whose currency you want to display on that 
line.
3. Hold Option   and press Return   twice to finish. 
Defining a custom...