This is mainly a one-way integration. Inventory items and other inventory related records get captured in Sage Evolution. These records are then automatically created in Paradigm for processing.
The inventory fields which are greyed out and uneditable, are the fields which are maintained in Sage Evolution. Hovering over one of these fields will display a tool tip stating this fact.
The inventory fields which are editable in Paradigm, are additional fields provided for data capturing or processing purposes within Paradigm.