Quick question about debit note and how it will work?

XML and business rules
1

This is the question about Debit Note

As we know editing and deletion of invoice is not allowed. So using below scenario i want to how debit note XML format will work?

Suppose user A created invoice for customer B ( Item A : Total amount 100 riyal )
and later customer A demanded change in service so User A will issue Debit note on same invoice , so now new invoice amount will be ( Item A : Total amount 130 riyal ).

my question in debit note XML format do i have to show extra 30 riyal for Item A only or do i have to show total 130 riyal for Item A

I hope you guys understand the question

2

You just need to make Debit Note for 30 Riyals