Mayor Zohran Mamdani admitted Tuesday that the promised lower prices at his city-owned grocery stores will only be guaranteed for a core set of everyday staples. “When it comes to the products that we will be selling at the city-run grocery stores, there will be an essential basket of goods that will be guaranteed a cheaper price, and cheaper than what they’re being sold at currently,” he said during a news conference at La Marqueta in Harlem.