Note: If your rules screen looks different from the image below, click here.
The Value rule performs a simple calculation using values from other fields in the document.
Example 1: Calculate Extended Price1
To Add a Value Rule, select the Rules menu.
Select the field you wish to apply the rule to.
You will then Select Value Rules.
Select the type of value rule that you want to use, we will use the Basic Math Function.
Choose the fields that need to be multiplied: Unit Price 1 and Quantity1
Select the mathematical function needed: Multiplication
Every time the Unit Price1 or the Quantity1 fields are updated, naturalForms will re-calculate the The Total will be updated every time that either subtotals, paid amount, or tax changes in naturalForms.
Here is what your rule should look like:
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