Inventories

Inventories are carried at the lower of cost and net realizable value, as determined using the weighted average cost method. Management compares the cost of inventories with the net realizable value and if applicable, an allowance is made for writing down the inventory to its net realizable value, if lower than cost. On an ongoing basis, inventories are reviewed for potential write-down for estimated obsolescence or unmarketable inventories which equals the difference between the costs of inventories and the estimated net realizable value based upon forecasts for future demand and market conditions. When inventories are written-down to the lower of cost or net realizable value, it is not marked up subsequently based on changes in underlying facts and circumstances.