Printpak uses a system of valuing stocks called "First In First Out" or FIFO. Stocks used are
assumed (for calculating the cost of sales) to be issued from the oldest available stocks. This
means that the system has to keep track of the cost of each batch of stock that comes in.
This stock valuation report itemizes for each stock item the different batches , the price (cost) that
was charged for them, their value, and the date of the invoice from which the cost is derived. If
the invoice has not been recorded in the system then the batch is marked as uninvoiced, and
valued at the default cost for that item.