cost of acquiring materials
the vendor's invoice price and transportation charges are the most visible costs of purchased goods. Less obvious are what may be called acquisition costs-the costs of performing the functions of purchasing, unpacking, inspecting, insuring, storing, and accounting. Practical limitation affect the treatment of these costs, because adjusting each invoice for all acquisitions costs involves efforts that may outweigh the benefit of accurate cost measurement. Therefore, materials are commonly carried at the invoice price paid to the vendor, and acquisition costs and price adjustments are treated as factory overhead.