Calculator
Keys & Functions Guide 

Power, Cancel & Correction Keys


ON/AC

Turns the calculator on if the machine is off. Clears all entries if the machine is on.


ON/C

Turns the calculator on if the machine is off. Clears all entries if the machine is on.


CE

Used to clear the last entry of a
calculation.


ON/CCE

Turns the calculator on if the machine is off.
When on, press once to cancel the last entry, twice to cancel the whole Entry calculation.


AC

Clears all entries.


C/CE

Press once to cancel the last entry, twice to cancel the whole Entry


OFF

Turns the calculator off



This Backspace Correction key allows you to backspace/edit the current entry.


OFF

Turns the calculator off


COST, SELL, MARGIN
Feature
Click here for an EXAMPLE of use.


COST

Used to calculate the Cost value, in conjunction with the SELL &
MARGIN keys. 

SELL

Used to calculate the Sell value, in conjunction with the COST &
MARGIN keys.


MARGIN

Used to calculate the Margin value, in conjunction with the COST &
SELL keys.


TAX Feature

For programming information click
on the type of calculator.
Desktop
Mini Printer
Desktop Printer


+
TAX

Press to add tax



TAX

Press to subtract tax


STORE

Used to store the tax rate (see programming
guide)


+TAX/C1

Press to add tax or to convert to local
currency (see programming guide)


TAX/C2

Press to subtract tax or to convert
to foreign currency (see programming guide)


RATE

Used to set or check the tax &
currency rates (see programming guide)


SET

Used to set or check the tax rate (see
programming guide)


Currency Conversion

For programming information click
on the type of calculator.
Desktop
Mini Printer
Desktop Printer


C1

Press to convert to local currency (see
programming guide)


C2

Press to convert to foreign currency (see
programming guide)


STORE

Used to store the currency rate (see
programming guide)


+TAX/C1

Press to add tax or to convert to local
currency (see programming guide)


TAX/C2

Press to subtract tax or to convert
to foreign currency (see programming guide)


RATE

Used to set or check the tax &
currency rates (see programming guide)


SET

Used to set or check the tax rate (see
programming guide)


Memory Keys


MC

Clears all entries from the memory.


M+

Adds the displayed figure into the memory


M

Subtracts the displayed figure from the memory


MR

Recalls the memory total


MRC

Press once to recall the memory total, press again to clear all
memory contents


MII


Subtracts the displayed figure from the
second memory


MII
+

Adds the displayed figure into the second
memory


MII
RC

Press once to recall the second memory total, press again to clear all
memory contents


Basic Function Keys




Minus key


+

Addition key


%

Percentage key


=

Equals key. On printing calculators only
used for multiplication & division calculations only


+ =

Used on printer models, combined minus & equals key. + Plus Equals


.

Decimal point


x

Multiplication key


*

Used on printer models, this shows the
total


Other Keys



Used to display the time & date.
Click on the model number for details on setting the date & time.
PR710,
PR720, PR730, PR5100.


MU

MU stands
for Mark Up, which is for calculating GROSS PROFIT MARGIN (GPM) used
in business environments.
There are two methods of calculating this, depending on the model of
the calculator.
example 1. Enter
100 then press the divide key, then enter 15 then press the MU
key, which displays 117.65 (15% of this total equates to 17.65)
example 2. Enter
100 then press MU key, then enter 15 then press the
% key, which displays 117.65 (15% of this total equates to 17.65)




GT

The Grand Total key
is used to show the cumulative total of your calculations (some models
need to have the slide switch set to "GT" to operate.
The Grand Total
function automatically cumulates the
entries you calculate when pressing the = key
e.g.:
enter 6 x 6 = Should display 36 then enter 10+5= Should display
15, if you hit the GT button it will display the total of these two sums 51.






00

Enters two zeros when pressed saving
time.


000

Enters three zeros when pressed saving
time.


+/

This changes a positive figure to a negative figure & vice
versa


#/P

Date Print / Print Used on printer models. In nonprint mode pressing this button prints what is shown on the display. In print mode enter the date e.g. 12.1 1.01 & press this button to print.




Slide Switches


Decimal Point Selector:
Used to set the
number of places after the decimal point.


A

Add Mode. Automatically sets the number
entered to 2 decimal places e.g. 123 = "1.23", 1 =
"0.01"


0

Automatically sets the answer to no
decimal places. e.g. an answer of 1.2345 will show "1"


1

Automatically sets the answer to 1
decimal place e.g. an answer of 1.2345 will show "1.2"


2

Automatically sets the answer to 2
decimal places e.g. an answer of 1.2345 will show "1.23"


3

Automatically sets the answer to 3
decimal places e.g. an answer of 1.2345 will show "1.234"


4

Automatically sets the answer to 4
decimal places e.g. an answer of 1.2345 will show "1.2345"


F

Floating. Automatically sets the answer
to the full number of decimal places e.g. an answer of 1.2345 will show
"1.2345"


Rounding Selector
Used to round up or down the final answer. Used in conjunction with the
decimal point selector



Rounds all decimal values
up e.g. When the decimal selector is set to "0" an answer of 1.1
to 1.9 will show as "2"



Rounds all decimal values down. e.g. When
the decimal selector is set to "0" an answer of 1.1 to 1.9 will
show as "1"


5/4

When the decimal selector is set to
"0" all decimal values between 1.5 & 1.9 are rounded up
to show "2" & all decimal values between 1.1 &
1.4 are rounded down to show "1"




Tax & Currency Modes


Tax

Setting the slide switch to this position
makes the +TAX &  TAX keys active (DT661, DT663, DT665 models)


Currency

Setting the slide switch to this position
makes the C1 & C2 keys active (DT661, DT663, DT665 models)

