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- Thank you for evaluating SCX!
-
- SCX is a general-purpose high-precision calculator that combines standard
- mathematical functions with pricing functions needed in the business/retail
- world. It's designed for simplicity and ease of use.
-
-
- If you find SCX meets your needs, please register - it's only $9.95 USD.
-
- For quick and easy on-line registration, visit:
-
- <http://www.quartus.net/products/scx>
-
- Group discount pricing is also available.
-
-
- *** Installation:
-
- Install the provided program file SCX_EVAL.PRC using the "Install" option of
- your Palm Desktop software. Once installed, SCX will appear as an icon in
- your Application Launcher.
-
- If you wish, you can make SCX the default calculator that pops up when you
- tap the Calculator silk-screen button. To set this up, use the Buttons
- panel in the built-in Preferences application on your Palm.
-
- SCX occupies approximately 20K of your Palm RAM. Should you be a Flash Pro
- user, SCX also runs fine from flash RAM.
-
- SCX is compatible with the full range of Palm devices.
-
-
- *** Features:
-
- - SCX has a large, easy to read 15-digit display with 30 digits of internal
- precision. The display has a gold background on color Palm devices!
- - Errors during entry can be corrected with the Graffiti backspace stroke.
- - The Cost/Sell/Margin buttons provide a simple way to determine pricing
- information.
- - The % function allows rapid discount and markup calculations.
- - The last-entered operator (+,-,x,÷) is highlighted, and
- can be repeated by pressing [=].
- - Keystroke equivalents allow SCX to be operated via Graffiti or an external
- keyboard.
-
- The registered version:
-
- - Supports cut and paste of numbers between applications (via the menu, or
- the standard Command-C and Command-P Graffiti strokes).
- - Retains the last calculation and memory values when you switch apps.
-
-
- *** Accuracy:
-
- SCX handles numbers with 15 digits to the left of the decimal point, and 15
- digits to the right of the decimal point, for a total precision of 30
- significant digits.
-
- The 15 most-significant digits of any result are displayed, although as many
- as 30 digits are held internally and used in subsequent calculations.
-
-
- *** Using the Calculator:
-
- SCX works in the same way as most familiar desk and handheld calculators.
-
- The buttons are as follows:
-
- [0-9][.] For numeric entry.
- [ac] "All Clear" -- Resets the calculator and clears the memory.
- [ce] Clears the current entry so that it can be re-entered.
- [c] Resets the calculator but does not clear the memory.
- [m+] Adds the current result to the value stored in memory.
- [m-] Subtracts the current result from the value stored in memory.
- [mrc] Recalls the value stored in memory. A second press clears the memory.
- [%] Calculates percentages (discounts, markups, ratios). Examples below.
- [+/-] Negates the current entry.
- [+] Addition operator.
- [-] Subtraction operator.
- [÷] Division operator.
- [x] Multiplication operator.
- [=] Equals (applies the operator to the entered values).
-
- [COST] COST/SELL/MARGIN are for calculation of cost price, selling price,
- [SELL] and profit margin. Examples below.
- [MARGIN]
-
-
- In addition to the on-screen buttons, you can use Graffiti (or an external
- keyboard) to operate the calculator.
-
- Function: Keystroke:
- ac z
- erase digit backspace
- 0-9 . + - = c ac 0-9 . + - = c
- x x or *
- ÷ ÷ or /
- +/- n (nEGATE)
- m+ m
- mrc r
- COST o (CoST)
- SELL e or s (seLL)
- MARGIN a (MaRGIN)
-
-
- *** Examples of Use:
-
- Clear the calculator with [ac] before trying each example.
-
-
- --- Basic Calculations ---
-
- Example 1:
- Problem: 23+4.5-53
- Calculator: 23[+]4.5[-]53[=] -> -25.5
- Graffiti: 23 + 4.5 - 53 =
-
- Example 2:
- Problem: 56x(-12)/(-2.5)
- Calculator: 56[x]12[+/-][÷]2.5[+/-][=]-> 268.8
- Graffiti: 56 x 12 n / 2.5 n =
-
- Example 3:
- Problem: 2x[7+6x(5+4)]
- Calculator: 5[+]4[x]6[+]7[x]2[=] -> 122.
- Graffiti: 5 + 4 x 6 + 7 x 2 =
-
-
- --- Repeated Operations ---
-
- Example 1:
- Problem: 2^7
- Calculator: 2[x][=][=][=][=][=][=] -> 128.
- Graffiti: 2 x = = = = = =
-
- Example 2:
- Problem: 100÷5^4
- Calculator: 100[÷]5[=][=][=] -> 0.8
- Graffiti: 100 / 5 = = =
-
- Example 3:
- Problem: 35^3
- Calculator: 35[x][=][=] -> 42875.
- Graffiti: 35 x = =
-
- Example 4: Number of cubic inches in a cubic mile
- Problem: (5280x12)^3
- Calculator: 5280[x]12[=][x][=][=] -> 254358061056000.
- Graffiti: 5280 x 12 = x = =
-
-
- --- Memory Calculations ---
-
- Example 1:
- Problem: 72÷3x(17-5)
- Calculator: 17[-]5[x]3[m+]72[÷][mrc][=] -> 2.
- Graffiti: 17 - 5 x 3 m 72 / r =
-
- Example 2:
- Problem: 7x8-4x5
- Calculator: 7[x]8[m+]4[x]5[m-][mrc] -> 36.
- Graffiti: 7 x 8 m 4 x 5 = n m r
-
- Example 3:
- Problem: 6÷(4x5)
- Calculator: 4[x]5[÷]6[m+]1[÷][mrc][=] -> 0.3
- Graffiti: 4 x 5 / 6 m 1 / r =
-
- Example 4:
- Problem: (53+6)+(23-8)+(56x2)+(99÷4)
- Calculator: 53[+]6[m+]23[-]8[m+]56[x]2[m+]99[÷]4[m+][mrc] -> 210.75
- Graffiti: 53 + 6 m 23 - 8 m 56 x 2 m 99 / 4 m r
-
-
- --- Cost/Sell/Margin Calculations ---
-
- To calculate cost, selling price, or profit margin, enter any two, and the
- third will be automatically computed.
-
- Example 1: Profit Margin
- To compute the profit margin percentage on a cost of $24 and
- a selling price of $30:
-
- Calculator: 24 [COST] 30 [SELL] -> 20.
- Graffiti: 24 o 30 e
-
- Example 2: Selling Price
- To compute the selling price on a cost of $45.00 and a margin
- of 55%:
-
- Calculator: 45 [COST] 55 [MARGIN] -> 100.
- Graffiti: 45 o 55 a
-
- Example 3: Cost
- If the selling price of an item is $12 and the margin is 10%, to
- compute the cost:
-
- Calculator: 12 [SELL] 10 [MARGIN] -> 10.8
- Graffiti: 12 e 10 a
-
-
- --- Percentage Calculations (markup, discount, restaurant tips, etc.) ---
-
- Example 1: Percentage
- Problem: 15% of $130 = ?
- Calculator: 130[x]15[%] -> 19.5
- Graffiti: 130 x 15 %
-
- Example 2: Markup
- Problem: $30 plus 10% markup = ?
- Calculator: 30[+]10[%] -> 33.
- or
- 30[x]10[%][+][=] -> 33.
- Graffiti: 30 + 10 %
- or
- 30 x 10 % + =
-
- Example 3: Discount
- Problem: $50 less 7% discount = ?
- Calculator: 50[-]7[%] -> 46.5
- or
- 50[x]7[%][-][=] -> 46.5
- Graffiti: 50 - 7 %
- or
- 50 x 7 % - =
-
- Example 4: Ratio
- Problem: $227 is what percent of $500?
- Calculator: 227[÷]500[%] -> 45.4
- Graffiti: 227 / 500 %
-
- Example 5: Combinations
- Problem: $78 less 10% discount plus 15% tax = ?
- Calculator: 78[-]10[%][+]15[%] -> 80.73
- Graffiti: 78 - 10 % + 15 %
-
-
- *** Other Information:
-
- SCX was written and compiled entirely on-board a Palm IIIx using the Quartus
- Forth compiler.
-
- Check out Quartus Forth and other useful Palm software at:
- <http://www.quartus.net>
-