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Finding a Square Root
To find a square root, enter the number
and press the square root key.
620 [÷] [=] 24.899
Currency Exchange
To determine a currency exchange rate, you
need to enter the current exchange
rate value.
For example, if the Euro was currently
pegged at 1 Euro = 0.9822 of the U S Dollar,
here is how you would do the calculations:
1. Select and hold down the [USD] key
until “0” shows.
2. Enter the USD value (0.9822).
3. Press the [USD] key setting the value.
How much is $150 in the Euro currency?
Enter 150 Press [USD]
Press [Foreign] 152.72
How much is 275 in the Euro currency
worth in U S Dollars?
Enter 275 Press [Foreign]
Press [USD] $270.11
Tax Calculations
To perform a tax calculation, program your
calculator with the tax rate by pressing and
holding the [%] key until “0” is displayed.
If, for example, the Tax Rate is 3.75%, enter
that value. And press the [%] key again.
Now the tax rate is set.
If a dinner bill is $120.00 how much is the
total bill including 3.75% tax?
Enter 120 [TAX+] 124.50
Enter [TAX+] again to see the amount of
tax paid 4.50
Your credit card charge is $138.00.
How much was the bill before tax was
added in?
Enter 138 [TAX-] 133.01
Enter [TAX-] again to see the amount of
tax paid 4.98
Simple Arithmetic Calculations
[+], [-], [X], [∏] and [=] are the standard
function keys.
Press the Equal key [=] to obtain the result
of an operation.
If the wrong function key is pressed during
an operation, pressing the correct key will
cancel the previous function.
Here is an example of addition:
9 [+] 9 [=] 18
Working with Percentages
Calculating percentages is easy with your
Datexx DH-170FS.
What percentage of 211 is 40?
40 [∏] 211 [%] 18.95%
What is 37% of 931?
931 [X] 37[%] 344.47
Working with the Memory
The memory functions of this calculator are
accessed with 3 keys:
• To store data in memory [M+].
• To subtract data from memory [M-].
• And finally, to recall stored memory [MRC].
Tapping [MRC] once displays the data
stored in memory.
Tapping [MRC] twice clears all data stored
in memory.
(You will note the memory symbol “M”
disappears from the calculator display
when the memory is cleared.)
You bought stock for $10 a share 10
MARGIN
[COST]
You sold it for $15 a share 15 [SELL]
Your Gross profit margin is
33.33%
Calculating the Gross Profit
Margin
Business Calculations
Determining the Selling Price
You bought an investment
property for $130,000
130000
SELL
[COST]
You would like to make
a 15% profit
15 [MARGIN]
The selling price should be 152,941
Determining Cost
(E.g., a Dealer’s Cost)
You know the car has an
MSRP of $35,000
35000
COST
[SELL]
You estimate the dealer’s
profit to be 15%
15
[MARGIN]
The Dealer’s cost is
estimated at
$29,750
Troubleshooting
Problem:
Nothing is displayed on the LCD display.
Solution:
Check that the battery is fresh and placed
correctly.
Care and Maintenance
Keep this unit dry. Avoid dropping the
calculator.
If it gets wet, wipe it dry before use.
Do not clean with harsh solvents or
detergents.
Wipe clean with a soft slightly damp cloth.
www.datexx.com
TELEDEX Limited U.S.A. Warranty
TELEDEX INC. warrants these products to the original purchaser to
be free from defective material and workmanship. The product will
be repaired or replaced at our option, for up to one year when
returned with proof of purchase to the address below. Include a
check or money order for $5.00 to cover postage.
TELEDEX INC. 1 Atlas st. Kenilworth, NJ 07033
Printed in China 10/02
Your calculator can handle standard
business calculations, such as determining
the Gross Profit Margin; how to set
selling prices, and how to calculate costs,
such as dealer cost.
(Note: Pay special attention to the keys
used below to be certain you are selecting
the proper key for your desired function)
COST
COST
SELL
SELL
MARGIN
SELL
COST
MARGIN MARGIN
Profit Analyzer