How do I calculate outstanding balance for product inventory?
Balance Tracker creates a balance sheet to display account credits and debits belonging to users. It can be integrated with views.


  It also provides UI tools, Views integration, and an API to allow the
  site administrators or other modules to credit or debit a user's
  account. This is intended for any website or service which credits
  users for accounts, sales, or other activities, and needs to track
  payouts.


I'm not using this before. Hope it helps you!!!