by excel How can I distribute the payment based on the due date of invoices " Oldest to newest "

Dear Sir ,

I have a collection of payments from several clients,as well many of  invoices for them , I have summed the payments for each client to be as one payment  in order to cover several Invoices .

My Question now , by excel How can I distribute the payment  based on the due date of  invoices " Oldest to newest " to settle it ,Knowing that maybe the payment closed  full or part of the bill.



My Case

1-Payment
Customer Name    Payment
A                                  5,000$
B                                  3,000$

2-Invoices

Customer Name    Invoice No     Invoice Amount           Bill Date                 Solution /  I looking for it  
A                                          5                   3,000$                      Jan 2016                                  3,000
A                                          6                   2,300$                     Feb 2016                                  2,000

So, please note regarding invoice 5 ,300$ not taken  because the payment from customer A was only 5,000$ so there is remaining balance from invoice 5 =300$ will settle in next payment

Your cooperation is highly appreciated

Best Regards
Ala'a Khalil