Inventories are initially recorded at the acquisition cost and subsequent valued at the lower of cost and net realizable value. Cost includes expenditure incurred in acquiring the inventories and bringing them to their existing location and condition. The weighted average method is used in determining the cost of inventories.
The cost of finished products and work in progress comprises raw materials, other production materials, direct labor, other direct costs, gains and losses with derivative financial instruments, and an allocation of fixed and variable overhead based on normal operating capacity. Net realizable value is the estimated selling price in the ordinary course of business, less the cost for bringing inventories to sales conditions and selling costs.
Inventories have their amount reduced on a case-by-case basis if the anticipated net realizable value declines below its carrying amount. The calculation of the net realizable value takes into consideration specific characteristics of each inventory category, such as expiration date, remaining shelf life, slow-moving indicators, amongst others.
