How to automatically populate inline in django admin?

Question

Django

Available online:

class PaymentInline(admin.TabularInline):
    model = Payment
    extra = 12

You need to make sure that the value "total" is 5000 in the first inline, and 4000 in all the rest, as well as fill the date field with the first days of the month starting from today (in February from March 1, etc.)
How to implement this ?

Answer 1

Well, there is an answer here: stackoverflow.com/questions/442040/pre-populate-an...
Should help...