HP 12C Platinum Owner's Handbook Manual page 94

96 Section 8: Programming Basics
required amounts for the first item on the invoice manually. The keystroke
sequence will use storage register arithmetic (described on page 25) in registers
R
, R , and R to calculate the column sums. Since these registers are cleared
1
2 3
when fCLEAR² is pressed, we'll press those keys before beginning the
manual calculation – and also later, before running the program – to ensure that
the column sums are "initialized" to zero. (Pressing fCLEARH would clear
registers R through R , but would also clear R
3
1
IRECT FORM PURCHASE REQUISITION OR ER
P.O. No. 25-
OR ER
CONFIRMING
ATE
Q T Y.
I T E M
SS4 Star Sapphire
RG13 Ruby Ring
GB87 Gold Band
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 u instructions in the program so
that the intermediate results AMOUNT and TAX are automatically displayed
when the program is executed.
, which will contain the tax rate.)
0
2 5 6 1 N . W. M o r r i s o n A v e .
N e w Yo r k , N e w Yo r k , 1 4 2 0 3
Te l e p h o n e ( 7 1 6 ) 7 3 1 - 8 2 4 0
SHIP VIA: SURFACE
VEN OR WILL CALL
U N I T
D E S C R I P T I O N A M O U N T
P R I C E
G163 iamond
E W E L E R S
AIR UPS
OTHER
TA X TOTA L