Amplicomms PowerTel M6000 Operating Instructions Manual page 54

Other Useful Features
Calculator
This feature provides a simple calculator feature with
which to solve simple basic calculations.
Use the + and , keys to select the required
arithmetic operation (+, −, x, ÷).
Use the # key to set a decimal point.
Use the * key to change the sign (±).
Menu
+ / , Extra
+ / , Calculator
Example
To execute the calculation −5 x 2.5 you have to
type the following keys;
5*= −5
+++ = x
2#5= 2.5
OK = −12.5
Clear = Delete
54
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Open the main menu
OK
Select the menu and confirm it
OK
Select the menu and confirm it