I'm trying to source the description and cost of the shipping item/method that's selected on an Estimate - and while trying to figure this out I've become a bit confused regarding sourcing shipping info in general.

For starters, the description. I can easily get the Name of the shipping method using ${record.shipmethod}, but that doesn't appear to be a valid way to source fields from the Shipping Item record, as ${record.shipmethod.description} returns an error. I have also tried ${record.shipitem.description}, but that returns an error when saving. Looking at the built-in Advanced Templates, they only include ${record.shipmethod}, not the description of the shipping method, so I can't cheat and copy something there