The latest surge in fuel prices, and disruptions to supply chains - are being felt at the pump, but not yet at the checkout.

Stats NZ is due to release its latest monthly inflation update on Friday.

But new data from Infometrics and Foodstuffs shows grocery-supplier-cost-inflation actually dropped in March, from 2.3 percent to just 2.1.

Vegetables New Zealand Chair John Murphy says told Mike Hosking rising costs are yet to translate into higher prices.

He says suppliers appear to be absorbing the higher costs so far, but it's unclear what will happen next.

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