Work in progress is valued at the lower of cost and net realisable value.
Cost is calculated using the first-in, first-out method and includes all purchase, transport, and handling costs in bringing stocks to their present location and condition.
Inventories, including land, are measured at the lower of cost and estimated selling price less costs to complete and sell. Cost is based on the weighted average principle and includes all costs of production, costs of conversion and other costs incurred in bringing the inventories to their present location and condition.