You can create one or more constants. You can use the constants in the formulas.
Click [Price and formula editor] - [Constants].
Click [Add].
Define a name. The name must be unique.
You can use the characters: 'a - z', 'A - Z', '0 - 9', '_' . Spaces are allowed.
Define a value for the constant. You can type a value in the text field. Or you can click the arrow buttons to increase or decrease the value.
Click [Save].
The constant is added to the list of variables for the formulas. You can use the constant in the formulas.