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["Atik Agewan\(OpenERP\)" <aag@xxxxxxxxxxx>]

** Changed in: openobject-addons
       Status: In Progress => Confirmed

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https://bugs.launchpad.net/bugs/806269

Title:
  product_margin module errors

Status in OpenERP Modules (addons):
  Confirmed

Bug description:
  This module is designed to show the margin per product, but it
  compares sales to purchases not sales to cost of sales. If the
  purchase quantity <> sales quantity then an invalid result is
  calculated.

  the purchases section should be renamed the "Cost of Sales" section.
  The #invoiced value should always equal the sales #invoiced value.

  The #Avg Unit Price should probably look at the purchases over the
  same period as the sales and calculate. While not always correct (as
  ignores stock on hand at start of period) is it a reasonable solution.
  Alternative is to to take current average cost, but that has issues if
  prices are moving through the reported period.

  Once the above is fixed the margin will calculate correctly.

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