Photo: 123RFA Wellington mum says she is relying on bread and pasta to keep food costs down and fill tummies at home. This comes as the Commerce Commission investigates the two big supermarket chains over pricing and promotional practices. Wellington mum and community worker Chanelle Pokoati said the high cost of groceries has made bread a crucial staple for her family. We eat a lot of pasta, rice, potatoes, and bread. He said right now, the lack of supermarket competition meant low wage earners were bearing the brunt of high grocery costs.