Message

Order balance line net amount SHALL equal (Ordered quantity * (Item net price/item price base quantity) + Order line charge amount - Order line allowance amount

Context
cac:OrderLine/cac:LineItem
Test
u:slack($lineExtensionAmount, ($quantity * $priceAmount), 0.02)
Usage
/ ubl:Order / cac:OrderLine / cac:LineItem / cbc:LineExtensionAmount