HP 12c Solutions Handbook page 95

Example 2: If an item sells for $21.00 and has a markup of 50%, what is
its cost? What is the margin?
Keystrokes
21
1 50
50
1
The following HP 12C program may be helpful for repetitive calculations of
selling price and costs as well as conversions between markup and
margin.
KEYSTROKES
CLEAR
1
n: Unused
PV: Unused
Display
21.00
50.00
14.00
50.00
33.33
04
REGISTERS
Selling price.
Markup (%).
Cost.
Margin (%).
DISPLAY
00-
01- 36
02-43, 33 04
03- 16
04-
05- 34
06- 25
07- 40
08- 10
09- 31
10- 43 36
11- 20
12- 43 36
13- 20
14-43, 33 00
i: Unused
PMT: Unused
94
1