
Hi,
The Row ID is the sales line id, which represents its SystemId GUID.The standard Sales Order Lines API does not expose UnitCost(LCY), so it cannot be checked directly in Power Automate. A small custom API extension is required to expose the sales line ID and UnitCost(LCY).Power Automate can then use the returned ID as the Row ID and check whether the unit cost is zero.
Altrnatively, the extension could expose only a Boolean field such as Zero Unit Cost, avoiding exposure of the actual cost value
Kind regards
Tarik Jerković