Rising dairy prices won't change the estimate of $4.70 per kilogram of milk solids
Fonterra won't reveal the plant cost.
GlobalDairyTrade (GDT) prices appear to have bottomed out in the last six weeks as dry weather threatens production.
The central bank expects whole milk powder, which is NZ's dominant dairy export, to rise to US$3,200 a metric tonne by early 2016.
Latest GlobalDairyTrade auction results.
The Meeting Place of Intelligent Business