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** Branch linked: lp:~credativ/openobject-addons/addons-syrup

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https://bugs.launchpad.net/bugs/785427

Title:
  [stable 6.0.2] Profit and Loss parser logic error leads to incorrect
  totals

Status in OpenERP Addons (modules):
  Confirmed

Bug description:
  In the P&L parser you have the following code

                      if typ == 'expense' and account.type <> 'view' and (account.debit <> account.credit):
                          self.result_sum_dr += abs(account.debit - account.credit)
                      if typ == 'income' and account.type <> 'view' and (account.debit <> account.credit):
                          self.result_sum_cr += abs(account.debit - account.credit)

  It is clearly incorrect - while it will work fine for those accounts
  that have the expected - or + balance imagine this situation (or any 1
  of a 100 other normal business or accounts setups).

  Lets say I offer rebates, but those rebates are not an expense, really
  they are a reduction in sales revenue, so I declare them as income
  (quite correctly, at least in my country), now instead of subtracting
  those rebates from the income total, I add them.  My income increases?
  By offering rebates? My Sales Manager just retired very rich.

  Take another really common example - any salespeople reading -
  salespeople jam their accounts full of product at the end of a fiscal
  period to maximise their commission.  Then in the first month of the
  period, all that product comes back and sales are actually negative
  for a while.

  What about FX Gains/Losses account or writeoff accounts.  Typically
  these are expense accounts, but sometimes we get lucky and they go in
  our favour.  But now we don't realise the benefit it is subtracted
  from our profit (well added to our expenses, which reduces our profit)

  You cannot use absolute value in any reports or functions relating to
  account.balances, you must either use the value, or the inverse of the
  value depending on whether it is defined as a debit or credit account.
  Or alternatively for debit accounts go dr-cr, and for credit, go cr-
  dr.  In fact, anytime abs is used in relation to anything accounting
  this should be raising a big red flag.

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