Storing And Recalling Numbers - HP 12C Platinum Owner's Handbook Manual

24 Section 1: Getting Started

Storing and Recalling Numbers

To store the number from the display into a data storage register:
1. Press ? (store).
2. Key in the register number: 0 through 9 for registers R
through .9 for registers R
Similarly, to recall a number from a storage register into the display, press :
(recall), then key in the register number. This copies the number from the storage
register into the display; the number remains unaltered in the storage register.
Furthermore, when this is done, the number previously in the display is
automatically held inside the calculator for a subsequent calculation, just as the
number in the display is held when you key in another number.
Example: Before you leave to call on a customer interested in your personal
computer, you store the cost of the computer ($3,250) and also the cost of a
printer ($2,500) in data storage registers. Later, the customer decides to buy six
computers and one printer. You recall the cost of the computer, multiply by the
quantity ordered, and then recall and add the cost of the printer to get the total
invoice.
Keystrokes (RPN mode)
3250?1
2500?2
;
Later that same day ...
Keystrokes (RPN mode)
;
:1
6§
:2
+
through R .
.0 .9
Display
Stores the cost of the computer in
3,250.00
R .
1
Stores the cost of the printer in R
2,500.00
Turns the calculator off.
Display
Turns the calculator back on.
2,500.00
Recalls the cost of the computer to
3,250.00
the display.
Multiplies the quantity ordered to
19,500.00
get the cost of the computers.
Recalls the cost of the printer to the
2,500.00
display.
Total invoice.
22,000.00
through R , or .0
0 9
.
2