
Example 2: If an item sells for $21.00 and has a markup of 50%, what is its cost? What is the margin?
| 
 | Keystrokes | Display | 
 | 
| 21 | 
 | 21.00 | Selling price. | 
| 
 | 
 | 
 | |
| 1 | 50 | 50.00 | Markup (%). | 
| 
 | 
 | ||
| 
 | 
 | 14.00 | Cost. | 
| 
 | 
 | 
 | 
 | 
| 50 | 
 | 50.00 | 
 | 
| 
 | 
 | 
 | |
| 1 | 
 | 33.33 | Margin (%). | 
| 
 | 
 | 
 | 
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 | 
 | 
 | DISPLAY | |
| 
 | 
 | 
 | 
 | 
 | 
| CLEAR | 
 | 00- | 
 | 
 | 
| 
 | 
 | 01- | 
 | 36 | 
| 
 | 
 | 
 | 
 | |
| 04 | 
 | 
 | 04 | |
| 
 | 
 | 03- | 
 | 16 | 
| 
 | 
 | 
 | 
 | 
 | 
| 1 | 
 | 04- | 
 | 1 | 
| 
 | 
 | 05- | 
 | 34 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 06- | 
 | 25 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 07- | 
 | 40 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 08- | 
 | 10 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 09- | 
 | 31 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 10- | 43 | 36 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 11- | 
 | 20 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 12- | 43 | 36 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 13- | 
 | 20 | 
| 
 | 
 | 
 | 
 | |
| 
 | 
 | 
 | 00 | |
| 
 | 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
 | 
| 
 | REGISTERS | 
 | 
 | |
| n: Unused | 
 | i: Unused | 
 | |
| PV: Unused | 
 | PMT: Unused | 
 | |
94
