President Donald Trump announced on Nov. 14 that his administration is rolling back select tariffs on items including coffee , beef, cocoa and bananas, as he faces blowback for high grocery prices. But that doesn't mean those prices are coming down anytime soon.

Consumer price relief will take time, according to supply chain management data and history.

The reason: inventories.

The food and commodities that have risen in price were purchased and imported under higher tariffs and stored in warehouses.

"Consumers haven't seen the really big impact of any inflation yet because it is sitting in the ' middle mile ,'" also known as warehouses and distribution centers, said Zachary Rogers, lead author of the Logistics Managers' Index and assistant professor of supply chain ma

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