TM
DD-820
Profit Analyzer
The DD-820 is a 12 digit desktop calculator with a special
PERFORMING CALCULATIONS
BATTERY REPLACEMENT
TM
Profit Analyzer Keys
MARGIN
feature that enpowers you to figure out
Press
Displayed
13
SELL
COST
Cost, Sell & Gross Profit Margins quickly.
It also calculates tax, tip,sur-charge added values of a fixed %
with the TAX+ TAX- analysis.
Addition (+)
USE ONE TYPE 389 BUTTON CELL BATTERY
SELL
COST
COST
Example: 6 + 7 = 13.
[6] [+] [7] [=]
Subtraction ()
Remove 3
Screws on
Back and
lift cover
off
SELL
MARGIN
MARGIN
FEATURES
Example: 10 4 = 6.
[1] [0] [] [4] [=]
[7] [x] [5] [=]
6
35
2
Profit Analyzer.
Multiplication (x)
Example: 7 x 5 = 35.
GROSS PROFIT % (MARGIN)
MARGIN
TAX+/TAX– Calculations
12 Digit Adjustable Display
Last Digit Correction
You bought an item for $10.00.
You sold it for 15.00
What is the Gross Profit Margin ?
COST
10.00
15.00
Division ()
Example: 14 7 = 2.
[1] [4] [] [7] [=]
Dual Power: Solar power with Battery Back Up
SELL
You made 33.33 % profit.
PERCENT CALCULATION
Percentages (%)
Example:
Calculate 6% of 100.
Press
Displayed
6
SELLING PRICE (SELL)
TURNING CALCULATOR ON & OFF
ON
SELL
AC
[1] [0] [0] x [6] %
You bought an item at
COST
12.00
Press ON/AC to turn on the calculator.
The calculator turns off automatically after
about 12 minutes if no key is pressed.
Example:
Add 6% tax to $20.
Located battery
Holder
[2] [0] [+] [6] [%]
21.2
120
20
You would like to make 20% profit
MARGIN
Example: Calculate a
20% discount from $150. [1] [5] [0] [–] [2] [0] [%]
This item should be sold for $ 15.00
OPERATING CALCULATOR
DECIMAL POINT SELECTOR
CONSTANT CALCULATIONS
Press = to repeat last function.
BUYING PRICE (COST)
COST
Example:Calculate 5 x 5 x 5 x 5 + 2 + 2 = 629
SELL
The item is sold at
90.00
25
Slide battery to left
using small
screw driver.
Then replace
+
Press[5] [x] [=] [=] [=] [+] [2] [=] [=] 629
The seller made 15% profit
MARGIN
SIMPLE EQUATIONS
(F)Floating, Fixed(0,2,4), (A)accountant,
(A) Add. Mode, (0,2,4)
How much was the cost for this item? $67.50
•
•
•
•
•
Press
(12 x –5)÷ 2 = 30 [][ ][2] [=]
Displayed
F 4 2 0 A
CARE AND MAINTENANCE
MINUS
30
190
56
Sets the number or digits that appear to the right of
152 + 38 = 190
78 – 22 = 56
22 x 12 = 264
312 ÷ 6 = 52
[1][5][2][+][3][8][=]
[7][8][][2][2][=]
[2][2][x][1][2][=]
[3][1][2][÷][6][=]
• Keep the calculator dry. If it gets wet, dry it before use.
the decimal point in the display. Example: 22 ÷ 7= ?
TAX CALCULATIONS
Switch
F
0
2
4
A
Display
3.14285. 3
3.14
3.1428 3.14
264
52
TAX
+
TAX
• Store the calculator at moderate temperatures.
ROUND UP / DOWN SELECTOR
Tip,Tax, Surcharge Rate
• Do not drop or strike the calculator.
SETTING THE TAX RATE
Example Setting TAX rate at 15%
GRAND TOTAL
GT
( ) An answer is rounded up
(5/4) An answer is rounded off
( ) An answer is rounded down
Every time the = key is pressed, the number in the
Hold down % key for 3 seconds
• Clean the calculator case only with a soft damp cloth.
display is memorized and GRAND TOTAL appears in the
display. Press GT to display the sum of all memorized
numbers. Clear the grand total by pressing ON/AC.
Key in rate
%
1
5
Do not use harsh cleaning solvents to clean the unit.
•
•
•
5/4
Once the TAX Rate is set, it will remain in memory until a new rate is entered
• Keep the display and solar panel clean.
TAX
+
TAX Added
+/– KEY
Press
Displayed
+/–
Example:
Calculate
A + B + C
How much is the total bill including 15% Tax?
The price is $120
Changes the displayed number from positive (+) to
negative (–) or from negative (–) to positive (+).
– appears when the displayed value is negative.
[6] [X] [7] [=]
[5] [+] [4] [=]
[2] [2] [–] [5]
42
9
17
TAX
+
120
138.00 (Total Amount+Tax )
In order to see Tax amount
A = 6 x 7
B = 5 + 4
C = 22 – 5
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 $3.00 to cover postage.
TAX
+
press
again and you will see the amount of Tax
GT
68
ON/AC KEY
ON
18.00 (Tax = 15% of 120 )
AC
TAX
If the calculator is on, press ON/AC to reset the display to 0.
TAX Subtracted
MEMORY CALCULATION
How much was the bill before Tax?
The taxed price is $300
[M+]
Add the displayed number into Memory.
M appears in the display.
Subtract the displayed number from Memory.
TELEDEX INC. 1 Atlas st. Kenilworth, NJ 07033
TAX
300
260.86 (The price before Tax)
Warranty valid only in the U.S.A.
Printed in China 5/00
LAST DIGIT CORRECTION
[M–]
In order to see Tax amount
Use backspace key
to delete the error digit.
TAX
press
again you will see the amount of Tax
[MRC] Displays the number stored in Memory. Press twice
39.14 (Tax Amount)
to clear Memory. M disappears from the display.
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