I don´t know much about ls retail but just forget what you think you know about nav, this works with automations and things like that even to set global variables.
I recommend you to go to "EPOS Main" form (everything maybe can be found here or most of it)and "POS Transaction" and "POS Trans. Line" table.
CU, perhaps "POS Post Utility"
Answers
I recommend you to go to "EPOS Main" form (everything maybe can be found here or most of it)and "POS Transaction" and "POS Trans. Line" table.
CU, perhaps "POS Post Utility"