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Owner's Manual
Please read before using.
Features
Dual Solar/Battery Power – built-in solar panel extends battery
life by powering the calculator in the light.
Four Function Memory – includes addition, subtraction, recall,
and clear.
+/– – Press to change the displayed number from positive (+) to
negative (–) and vice versa. "–" appears when the number is
negative.
MU – Mark up calculation.
GT –
GT (Grand Total) lets you perform cash register calculations
simply and quickly. Every time you press [=], the displayed
number is memorized and "GT" appears. Press [GT] to display
the sum of all memorized numbers.
EX (Exchange key) –
Exchange two operands between the
operator. For example key in [2][–][8] and then press "EX" will
change to [8][–][2], and you will get the answer of 6.
IC – item counter.
To shift a displayed value digit by digit to the right, until you
get to the digit you want to re-input from.
Automatic Power Off – saves battery power by turning off the
calculator if it is left unused for about 8 minutes.
Memory Functions
[M+] Press to add the displayed number to memory, "M" is
displayed.
[M–] Press to subtract the currently displayed number from
memory.
[MRC] Press once to recall the number in memory. Press
twice to clear the memory.
Setting the Tax Rate
• Input the tax rate (e.g. the tax rate is 8%, then input "8"), press
"TAX RATE" and then "TAX+", the rate is set.
• To check the tax rate stored in the tax memory, press "TAX
RATE" then "TAX–", the rate will be shown on the display.
Performing Calculaations
Example Key Operation Display
6 + 7 = 13 [6] [+] [7] [=] 13
10 – 4 = 6 [1] [0] [–] [4] [=] 6
7 x 5 = 35 [7] [x] [5] [=] 35
14 ÷ 7 = 2 [1] [4] [÷] [7] [=] 2
√64 = 8 [6] [4] [√] 8
Calculate 6% of 100
[1] [0] [0] [x] [6] [%] 6
Calculate a 20% [1][5][0][x][2][0][MU] 180
discount from $150.
Selling price [1][5][0][–][8][0][MU] 87.5
= $150, cost
= $80, what is
the mark up
Original cost [1] [5] [0] [TAX+] 162
= $150 [TAX+] 12
calculate price-plus-tax
and the tax amount
Price including [1] [6] [2] [TAX–] 150
tax = 162, [TAX–] 12
calculate price-less-tax
and the tax amount)
80 x 9 = 720 [8] [0] [x] [9] [M+] 720
–) 50 x 6 = 300 [5] [0] [x] [6] [M–] 300
+) 20 x 3 = 60 [2] [0] [x] [3] [M+] 60
=) 480 [MRC] 480
8 x 6
[ON/C.CE]
[GT] [GT]
23 x 45
[8] [x] [6] [=]
48
= [2] [3] [x] [4] [5] [=] 1035
[GT] 1083
Power Supply
The dual power system of this calculator uses a solar cell, in
addition to one “AA” size battery. To replace the battery, simply
slide the battery cover in the direction of the arrow and then replace
the battery. Note that a dead battery can leak and damage the
calculator if left in the battery compartment for long periods.
Care
• Avoid dropping the calculator and otherwise subjecting it to
severe impact.
• Never bend or twist the calculator.
• Never try to take the calculator apart.
• Wipe the calculator with a soft, dry cloth to clean it.
DUAL POWER
CALCULATOR
DD-980