Hi Ali
You will find that those prices are pretty much the going rate, however Woolworths is one of the more expensive chain of grocery stores in New Zealand, you will find Countdown and Pak 'N Save heaps cheaper, but at least this will give you an idea.
When I'm sending out my
Pre-Arrival Packs many people ask for information on grocery prices, so I include some of the areas local mail-outs with grocery prices to help them get an idea.
You can buy produce from produce stalls or markets and yes, it is cheaper, there are also butchery shops that sometimes have cheaper meat cuts, etc, it just depends where you live really.