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This document is a guide to using
some of the basic features of BizCalc. Some of the more
complex analyses or calculations that BizCalc can perform
include Price of a Mortgage traded at a discount, Rent
or Buy decisions, Advanced Payments for Leases, Modified
Internal Rate of Return, Deferred Annuities, Depreciation,
Amortization, Wrap Around Mortgages, Variable Rate Mortgages,
Savings, Bond, Break-even Analysis, Forecasting, Pricing,
Statistics (Curve Fitting, Chi Square, etc.), Queuing & Waiting
Theory calculations and more. For more examples of calculations
and analyses than those provided in this Guide or the
on-line help, please send e-mail to BizCalc@odysseyinc.com.
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Fast, efficient and versatile -
Many different ways of invoking a command: main menu
options, toolbar icons, screen keys, and keyboard.
You can use the keyboard to enter numbers and hitting
the Enter key on the keyboard is the equivalent of
tapping on the Enter key. For example, to display
the tape, you can tap on the Tape icon from the toolbar,
tap on View, Tape or press Ctrl+T.
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Toolbar Icons - BizCalc for Windows
95/NT does not have any Toolbar icons. Pocket
BizCalc has 8 Toolbar icons. The ToolTips for the
icons are displayed by keeping the stylus pressed
down on any of the icons.
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Prefixes - Unlike the HP-12C, BizCalc
does not utilize the gold prefix key [f] or the blue
prefix key [g]. To invoke the alternate functions,
you would simply click on the desired function directly
below or above the primary key button. For example,
to get the square root of a number, just click on
 which is located just
below the  key.
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RPN Logic - Reverse Polish Notation
Logic is an efficient style of arithmetic calculations
that doesn't require an '=' key. RPN has an advantage
over algebraic calculators when performing multiple
calculations involving intermediate results.
- With an ordinary algebraic style calculator,
you would enter a calculation just as it is written.
To add numbers 4 and 3, you would enter "4 + 3 =" (for
a total of 4 steps). The result, 7 will be displayed.
To multiply this result by 5, you would press "* 5 =" (for
another 3 steps) to yield the result, 35.
- With a RPN calculator, the same equation
would be entered as "4
 3  " (a total of 4 steps).
To again multiply this result by 5 you would now enter "5  " (another 2 steps). With each new step, the result of the last
step becomes the first number of the next step. One other
function key you should know about is the  key, similar to the [AC] key in algebraic
calculators. It is used to clear the value in the display.
Tape
Display - BizCalc includes a display that
can show the contents of the stack registers, contents
of the memory registers or a paperless adding tape.
To change the display, simply click on View,
and then select Tape, Memory or Registers.
The tape can be annotated, date/time stamped, and
saved for later use. To save the tape, from the
BizTape window, click on File, Save
As. Then, type in the desired filename. To retrieve
a saved tape, click on File, Open.
Then double click on the desired tape file to open.
You can display the tape, together with the Stack
contents, and memory register contents simultaneously
on your desktop and rearrange them.
To save the tape in Pocket BizCalc,
tap on Tape, Save As. Then, type in the
desired filename. To retrieve a saved tape, tap on Tape, Open.
Then tap on the desired tape file to open. In Pocket
BizCalc, you can only display the tape or the memory
register contents or stack contents one at a time.
Decimal
Places - To
specify the number of decimal places in BizCalc, click
on Options, Preferences, and then type
in the number of Decimal Digits in the box. In
Pocket BizCalc, click on View, Options.
Random
Number Generator - BizCalc includes a  key that calculates uniformly
distributed pseudo numbers between 0 and 1.
Pi -
BizCalc has a  key that will display the value
of Pi to 18 significant figures.
Sign
Convention Used - Compound
interest calculations involve money being received as
well as paid out. Thus a loan calculation would involve
a positive present value and a negative payment. In general,
incoming cash flow streams are positive and outgoing
cash flows (payments) are negative. BizCalc requires
that the proper cash flow sign convention be used when
performing financial calculations. In BizCalc, the "-" key is used only for subtraction purposes
and not to denote a negative number. The  key is used to change the sign of
a number from positive to negative or vice versa.
Keyboard Entry -
In addition to entering figures and pressing the keys
on-screen, you can use the keyboard to type numbers into BizCalc. Some
of the not so obvious keyboard equivalents are:
| On-Screen Key |
Keyboard Equivalent |
| ÷ |
/ |
| x |
* |
 |
Backspace |
| |
Esc |
![[EEX]](Features_List/eex.gif) |
E |
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N |
Loan/Mortgage
Calculations with Amortization Schedule
Example: Suppose you wish to take
a home improvement loan to add another bedroom. Calculate
the monthly payment assuming that the loan is for $30,000
at 10% for 3 years. (Always remember to clear the financial
registers by clicking on the  key.
| Keystrokes |
Comments: |
(1) 30000  |
Enter loan amount |
(2) 10  |
Monthly interest
rate |
(3) 3  |
Term of loan
in months |
(4)  |
Calculate monthly
payment |
The monthly payment amount should be $968.02.
To look at the Amortization Schedule, tap on View, Amortization
Schedule. You will be able to see that payment number
4 is made up of $736.12 in principal paydown and $231.90
of interest payments. You can also save the schedule
as text file by tapping on the Save Schedule button.
Markup
Functions
BizCalc includes four additional keys:  for Cost,  for Price,  for Mark Up as a % of Cost, and  Mark Up as a % of Price or Margin.
Once any two of the inputs have been entered, the other
two results can be obtained easily.
Example: Assuming that you would
like to find out the markup and selling price of a product
that costs $100 with a desired margin of 20%.
| Keystrokes |
Comments |
| (1) 100 |
Cost of product |
| (2) 20 |
Enter Margin |
| (3) |
Calculate Price
($125) |
| (4) |
Calculate Markup
(25%) |
For the results,
tapping on will show 125 (i.e., the selling
price should be $125) and tapping on will show 25% (i.e., there is a markup
of 25%).
Calendar/Date
Arithmetic
The  function is used to determine a
past or future date given a date and a number of days.
The  function is used to determine the number of days between 2 dates.
These functions are often used in conjunction
with bond calculations and compound interest calculations
involving odd-periods.
Dates are entered in either Month-Day-Year
format or Day-Month-Year format. By default, BizCalc
uses the Month-Day-Year format. If you wish to change
to the Day-Month-Year format, press  . To change back to Month-Day-Year,
press  .
Example 1: Calculate what day of
the week is 120 days from July 25, 2000.
|
Keystrokes
(Assuming you are in the M.DY mode.)
|
Comments |
| (1) 7.252000 |
Enter date |
| (2) 120 |
Calculate 120 days
ahead |
The result
is 11,22,2000 3. That is, November 22, 2000. The trailing
3 means the day of the week is Wednesday (1=Monday, 2=
Tuesday, etc.).
Example 2: Calculate the number
of days between January 1, 1999 and January 3, 1999.
| Keystrokes (Assuming
you are in the M.DY mode.) |
Comments: |
| (1) 1.011999 |
Enter first date. |
| (2) 1.031999 |
Calculate number
of days between dates. |
The result
is 2 days.
Programming Programming BizCalc is a process whereby
you "teach" the calculator a series of keystroke steps
that you may use repeatedly. BizCalc allows up to 999
program steps. Example: Create
a simple program that will calculate the total gross
profit, given the number of units sold, price and cost
of the widget. Assuming the price is $10, the cost is
$7 and the number of units sold is 100. Storage Register
1 will be the number of units, Storage Register 2 will
be the cost of the widgets, and Storage Register 3 will
be the price of the widgets. The formula is: Total Gross
Profit = (Price – Cost) x Number of Units Sold.
| KeyStrokes |
Comments |
(1)   |
Start recording
and clear previous program |
(2)  3 2 - |
Calculate Price
minus Cost (Gross Margin) |
| (3) 1 x |
Multiply by no.
of units sold |
| (4) |
End recording of
steps |
(5) 100  1 |
Store number of
units sold |
| (6) 7 2 |
Store cost |
| (7) 10 3 |
Store price |
(8)  |
Run program |
The answer
is $300. Now, if you would like to calculate what the
total gross profit will be assuming that the price is
increased to $11 per widget, store 11 into storage register
3 by keying in "11 3". The answer should be $400.
You can save these programs by tapping
on File, Save As. Then type in a filename,
which will be automatically saved by BizCalc with the
.PGM extension. You will be able to save multiple programs.
To run these saved programs, tap on File, Open,
then run the program in the usual manner.
For more calculation examples, please consult
the on-line help.
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