Correct me if I'm wrong but even the latest openerp does not allow simple product costing calculation.
When companies import a product, we issue a PO and forwarders take care of importing and clearing the products. The invoice with taxes and duties will come later, not at the same time the PO was generated since not all companies do FOB shipment. Even with FOB, it's not a door to door service so there's always a later part where an additional invoice would come in which adds to the product cost.
I have not found a proper way to get this done. How do I go about linking a set of expenses to a certain PO and calculating the average costing for that particular shipment? Then from there calculate the average cost of the product automatically using the average costing method in openerp?
There is a "landed_costing" module but this module is flawed. The module would calculate the landed costing fine BUT it simply creates a separate journal entry including the "landed cost" BUT the extra landed cost is not accounted for in the journal entry! That totally messes up the whole system.