SIL SIH Invoice History Navigation

[Al Mac <macwheel99@xxxxxxxxxxx>]

I'm working on a billing history report where I need to access data not in 
the invoice files (SIL detail lines SIH header summary).  We're 405 CD.

Is SIL.ILSEQ, which immediately follows SIL.ILORD (original order#), the 
line # on that order# (ECL file) corresponding to the shipment being billed?

Is there any code showing what is a credit from BIL600 that has no RMA# or 
can I only go by whether $ total is positive or negative?  What's needed is 
to show which records from the invoice history files are real invoices and 
which are actually credits.

Another thing they need is when the invoice was due (assuming no discount 
taken, vs. when due if discount is taken) ... I can calculate that from the 
terms, but I figure that data has got to be already someplace in Accounts 
Receivable RAR detail file, if I can only figure out relevant linkage from 
invoice # to whatever would be the correct type of record with that 
data.  I would prefer to copy it from RAR because our terms are 
periodically changed, which impacts different orders, invoices, etc.
-
Al Mac