HP HP-18C User Manual

COST is a shared user-variable. You can calculate a value for COST
using the custom menu for CARPETPRICE, and then switch to the
custom menu for TOTALPRICE. Since the value for COST is shared,
you do not need to store it again. After entering HOURS, you can
calculate CHARGE.
No sharing occurs between built-in variables and user-variables. For
example,
the COST user-variable in the formula solver is not shared
with the COST built-in variable in the MU%C and MU%P menus.
Deleting the Current Formula and/or Its
User-Variables
Each formula in the formula list uses calculator memory to store the
formula and the user-variables in the formula . For example, the
formula:
P P S 'l }::L }: : ~j.;-9 = C I] S T
uses five storage locations. One location stores the formula ; four loca-
tions store
the user-variables PPSY, L, W, and COST. Deleting the
variables frees the storage locations used to store PPSY, L, W, and
COST. Deleting both the variables and the formula frees these four
locations, plus the location used to store the formula.
To delete the user-variables, or both the user-variables and the
formula:
1. Press Ii1BiI to display the DELET menu .
2. Do a or b:
a. Press " to delete the user-variables associated with the
current formula . The user-variables are created again the
next time you use the formula. If the user-variable is a
shared variable, its value is lost to all the formulas that
share it.
b. Press ImIDI to delete the current formula and its user-
variables.
9: The Formula Solver 135

HP HP-18C Specifications

General

Brand	HP
Model	HP-18C
Category	PDA
Language	English