Identifying Missing Numbers And Updating In Single Cell

As i am working on consolidating the Missing numbers manually, whether will it possible for making this automatic.

In Column "A" I have Multiple Duplicate Invoice Numbers and followed by the Different Transcation numbers in Column "B".

In Column "D" I have Each Invoice Numbers and in Column "E" Total Transaction Numbers i.e., no. of times each Invoice have Transactions.

In Column "F" No. of times we received the Transactions.

Here i need to manually need to update each Invoice's Missing Transaction number in Column "H" in single cell with comma separated to each Missing Transaction numbers.

Example:

Before : (Column "A" & "B")

Invoice NumbersTransaction NumbersInvoice NumbersTotal Transaction NumbersReceived Transaction Numbers
A2014000351501 A201400035150 3 2
A2014000351502 A201400035494 13 12
A2014000354941 A201400035881 12 11
A2014000354942 A201400035884 19 17
A2014000354943 A201400035888 14 13
A2014000354944 A201400037613 5 1
A2014000354945

[Code]...

Instead of doing this manually can we have the VBA to auto Update these missing numbers.

Here by i am attaching sample file.