Custom column linking: You can link the item custom fields by applying the formulas.
For Example:
Formula: Height * Width * Price * Quantity.
Step 1: Add the “Item Custom fields”.
To know how to add item custom fields you can click on the link below.
Step 2: Apply the formula in “Net Amount”.
Click on “Edit” and select types as “Formula”.
In the expression enter the formula by selecting custom fields (type @select the field).
Step 3: Click on “Save”.
Step 4: Click on “Close” and “Update settings”.
The formula is successfully applied for all documents.
Please note: Custom column linking feature is an add-on feature.
Click here to know more about the Custom column linking Swipe