I have been putting off doing my updates. Is there any particular order that the new upgrades should be done.

My Current versions are:

Bank Rec 8.1A should be 8.1B
Invoices 8.1A should be 8.1B
Accounts Receiveable 8.1A should be 9.0A
Accounts Payable 8.1A no upgrade required
Ledger 9.0A should be 9.0B
Adagio Lanpak 9.0A should be 9.0B