HP 12C Platinum Owner's Handbook Manual page 19

Example: Suppose you've written three checks without updating your
checkbook, and you've just deposited your paycheck for $1,053.00 into your
checking account. If your latest balance was $58.33 and the checks were written
for $22.95, $13.70, and $10.14, what is the new balance?
Solution: When written down on paper, this problem would read
58.33 – 22.95 – 13.70 – 10.14 + 1053
Keystrokes (RPN mode)
58.33
\
22.95
-
13.70
-
10.14-
1053+
Section 1: Getting Started
Display
Keys the first number.
58.33
Pressing \ separates the second
58.33
number from the first.
Keys in the second number.
22.95
Pressing - subtracts the second
35.38
number from the first. The
calculator displays the result of this
calculation, which is the balance
after subtracting the first check.
Keys in the next number. Since a
13.70
calculation has just been
performed, do not press \; the
next number entered (13.70) is
automatically separated from the
one previously in the display
(35.38).
Pressing - subtracts the number
21.68
just entered from the number
previously in the display. The
calculator displays the result of this
calculation, which is the balance
after subtracting the second check.
Keys in the next number and
11.54
subtracts it from the previous
balance. The new balance appears
in the display. (It's getting rather
low!)
Keys in the next number – the
1,064.54
paycheck deposited – and adds it to
the previous balance. The new,
current balance appears in the
display.
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