I'm trying to create a record that includes the serial numbers of the received items from the item receipt.

I've attached my script which at the moment isn't doing much because there is nothing being returned in the serialNumber variable. Currently logging 'undefined' so I'm assuming this method of trying to get the values is wrong. But I can't find any examples or tutorials on how to target this particular list of information.

Would really appreciate some guidance. THanks!

Execution log, logging the 2 line items but not the serial numbers contained within either.

Item receipt example. Script should be able to loop through all 6 items and retrieve the serial numbers.