118  Section 8: Programming Basics 
 
 
File name: hp 12c pt_user's guide_English_HDPMF123E27  Page: 118 of 275   
Printed Date: 2005/8/1    Dimension: 14.8 cm x 21 cm 
 
 
Pressing the 
gu
 keys is not necessary when we do the calculations manually, 
since in Run mode the result of every intermediate calculation is displayed 
automatically; but we’ll include 
gu
 instructions in the program so that the 
intermediate results AMOUNT and TAX are automatically displayed when the 
program is executed. 
Keystrokes 
(RPN mode) 
Display  
6.75
?
0 
6.75 
Stores tax rate in R
0
. 
f
CLEAR
²
 
0.00 
Clears the registers in R
1
 
through R
6
. 
13 
13. 
Keys in quantity of item. 
\
 
13.00 
Separates quantity of item from 
cost of item to be keyed in 
next. 
68.5 
68.5 
Keys in cost of item.