F-28 and F-32 Payment Allocation

Question

Dear Experts,
Would like to request some of your inputs with regards to partial allocation of payments.
Using the tcodes F-28 and F-32 for payment allocation creates a new document for the remaining unpaid.
Shown below is an example of allocation for several billing documents.
How would you identify which of the cleared documents have the remaining unpaid billing?
Payment                             
   001 DZ  150,000.00
Billing Documents
   002 AB    30,000.00
   003 FC     45,000.00
   004 DZ     70,000.00
   005 LT      30,000.00
     Total    175,000.00
Allocation                            Clearing
   005 LT      30,000.00           001
   003 FC     45,000.00           001
   004 DZ     70,000.00           001
   002 AB       5,000.00           001
    Total      150,000.00
Remaining Unpaid
   001 DZ       25,000.00
Thanks in advance.
Kath

Answer 1

I understood what you explained. That was a very good answer, however i have 1 more question.
1. For Eg: I posted a customer invoice for Rs 100,000 and customer paid the whole amont. After doing fb70 can we do f-32 directly? Or we have to do f-28 first and then clear it in f-32.
My problem is, customers are set up on company code 1000, but this cocd does not have any house bank and hence no bank GL account. 
We do the FB70 on company code 1000. However I need to clear this amount using a bank gl account of company code 2000. Company code 2000 is the main Cocd and has a house bank and bank GL account.
So im not able to select a CoCd 2000 bank gl account  as it doesnt exist while doing f-28 for company code 1000 who received the invoice and payment. But  im able to do this on f-32. When i click on OVERVIEW in f-32, then at the bottom there is a field for NEW Company Code.It uses cross company clearing.
Hence i want to know, if it is ok to do a f-32 directly after doing a FB70.
I hope my scenario is clear.
Thanks.