prices of staple commodities
Economic term referring to the prices of essential goods such as food, energy, and basic materials.
Rising prices of staple commodities are putting pressure on household budgets.
物価 means 'prices' or 'cost of living' in general, while 主要物価 specifically refers to the prices of key staple goods.
Compound of 主要 (main, principal) and 物価 (prices, commodity prices).