Victor Enterprise 1260-3 manual 19. + Sign Change Key, 20. ∆% Delta Percentage, 23. − Minus Key

19. [+/-]	Sign Change Key
	Reverse the sign on the display.
20. [∆%]	Delta Percentage
	Automatically compares any two amounts and then calculates and
	prints the difference and percent of change.
21. [C/CE]	Clear / Clear Entry Key

Clears a live entry by pressing this key once. Press twice to clear the accumulator or pending calculation. Does not clear the Memory or Grand total.

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 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 Minus key as many times as necessary. If this
	key is depressed immediately after [%] key, it works as percent minus
	key.

24. [+]	Plus 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 Plus key as many times as necessary. If this key is depressed
	immediately after [%] key, it works as percent plus key.

25.	[N]	Item Count Key
		Calculations with item count and/or averaging. Also used to set the N
		count to Gross or Net.
26.	[# / S]	Date / Subtotal Key

#: It will print live entry as an identifier as an invoice number with “#” mark.

	S :	It prints but does not clear the accumulator.
27.	[T]	Total Key
		Prints and clears the accumulator. When this key is pressed with the
		“GT” switch is on, the result is accumulated automatically in the
		memory register.
28. [MT]		Memory Total Key
		Prints and clears the memory.
29.	[MS]	Memory Subtotal Key
		Prints but does not clear the memory.
30.	[M-]	Memory Minus Key
		Subtracts an amount from memory. If there is a live calculation
		pending, the Memory Minus key will complete the calculation and
		subtract the amount from Memory.
31.	[M +]	Memory Plus Key
		Adds an amount to memory. If there is a live calculation pending, the
		Memory plus key will complete the calculation and accumulate the
		result to Memory.
32. [⎟], [=]		Square Root

By depressing the ⎟ and then the = key the square root result will be achieved.

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