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17. [# / ◊] Date / Subtotal
#: It will print live entry as an identifier as an invoice number with “#”
mark.
◊: It prints but does not clear the accumulator.
18. [] Total Key
Totals the accumulator and clears all except the memory or grand total.
19. [+/-] Sign Change Key
Reverse the sign on the display.
20. [%] Delta Percentage Key
Automatically compares any two amounts and then calculates and
prints the difference and percent of change.
21. [CE] Clear Entry Key
Clears a live entry by pressing this key once.
22. [0]-[9], [00] & []Numeric Keys
The calculator uses the conventional 10-key indexing keyboard, and
includes the double zero key and decimal point key. Whole numbers
are entered exactly as they are written.
23. [−=] Minus Equal Key
Subtracts an amount from the accumulator. To subtract the same
amount more than one time (repeat subtraction), enter that amount
once and depress the [−=] key as many times as necessary. If this key
is depressed immediately after [%±] key, it works as percent minus
key. Complete Multiplication, Division and Delta Percentage
calculation.
24. [+=] Plus Equal Key
Adds an amount to the accumulator. To add the same amount more
than one time (repeat addition), enter that amount once and depress
the [+=] key as many times as necessary. If this key is depressed
immediately after [%±]key, it works as percent plus key. Complete
Multiplication, Division and Delta Percentage calculation.
25. [%±] Percent Key
Completes percent calculation when [x] or [division] key is used.
Calculation for square root.
16. [√ ] Square Root
