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Ask almost any shopper outside this sprawling Walmart southeast of Savannah, and they'll tell you about rising prices.

"The meat is going up. Milk, eggs, everything is going up," says Cicely Gardner, rolling a cart with some doughnuts in the parking lot.

But wait. The rate of inflation has cooled for two years, and not everything is going up in price. So why does paying at checkout still cause such heartburn? What gives?

NPR set off to answer that question at the most popular retailer in the United States. For six years, 

 the prices of dozens of items at this very Walmart superstore. And here's what we learned on our latest visit, in December. 

 to see the full details of NPR's shopping cart.)

On average, prices ticked up 0.7% last year

NPR's list includes 96 items from virtually every Walmart aisle: chips and veggies, shampoo and T-shirts, dog food and paper towels. To account for changes in package sizes, we focus on the price per unit, typically per ounce, whether it's toothpaste in a tube or soup in a can.

Over the course of 2024, the tracked prices on average increased just 0.7 percent

— far less than overall annual inflation, which was 

. (December's inflation data will be released on Wednesday.)

That's because exactly half of our tracked prices stayed the same from December 2023 to December 2024 — a notable relief after the COVID-19 pandemic, when most prices jumped year to year because of turmoil in supply chains and labor markets.

How prices changed at a Georgia Walmart over the past year

Twenty-one items in NPR's shopping cart actually got cheaper during the year, including garlic, bananas and salmon. Another 27 products got more expensive, including eggs, ground beef and laundry detergent.

How the prices of food and personal care items have shifted since 2023

Items in NPR's shopping cart are much pricier since mid-2019, 

 before the pandemic. On average, those tracked prices have increased around 25 percent. And that's not far from federal inflation data: Cumulatively, U.S. prices are up 23 percent since 2019.

For example, a 4-pound bag of Domino sugar now costs $4.46. That's 74 percent more compared with NPR's visit to Walmart in 2019. A dozen eggs cost $4.90, or 83 percent more than they cost five years ago. Tide liquid laundry detergent now comes in a smaller container — 84 ounces instead of 100 ounces — but costs $1 more, in a classic case of 

How prices have changed at a Georgia Walmart since mid-2019

Back in 2019, NPR's visit to this suburban Walmart, near a large Army base, focused on the impact of 

then-President Donald Trump's trade war with China

. Our shopping cart was smaller, filled with many products either imported or made with imported parts. Only a few of those items have now gotten cheaper, including frozen shrimp, swai fish and — most dramatically — screwdrivers. (Walmart has switched brands, and the price is now 60 percent lower than it was.)

Big price increases are rarely followed by equally big price decreases, historically. That's because seismic shifts in the global economy cannot simply be undone.

For example, it still costs more than it did in 2019 to ship things across the world. It costs more to fertilize soil where our food grows, because 

 of fertilizer. Prices have grown for paper and corrugated cardboard used in packaging. President Biden has largely kept Trump's tariffs on Chinese imports, which means U.S. companies are paying higher import fees — and passing some of that cost on to shoppers.

Stores, factories, farms and warehouses are paying more for utilities and insurance. Gas prices affect the cost of trucking. American wages, on average, have 

 for more than a year and a half, with some wage increases affecting the cost of making, packing, selling and delivering our purchases.

 and coffee — have faced specific troubles. Cases of 

 in chickens and cows. Dairy and cattle farmers also point to droughts increasing the cost of feed. Extreme weather has damaged harvests of coffee and cocoa, leading to 

Here's what Walmart and manufacturers had to say

NPR asked the companies that make the items in our shopping cart to explain their price increases. Some didn't respond, including PepsiCo's Frito-Lay, Eggland's Best and Unilever, which makes Dove, Degree and Vaseline. And from those that did reply, we heard a common refrain: It simply costs more to make stuff.

The maker of Domino sugar, ASR Group, sent a detailed list of price increases it has faced since the start of the pandemic: general freight trucking costs up 19 percent, deep-sea shipping up 45 percent, rail-freight shipping 17 percent, wages 15 percent.

General Mills, whose Yoplait yogurt cup is 17 cents (or 28 percent) pricier than it was in mid-2019, said 

A 16-ounce jar of Jif peanut butter is 90 cents (or 41 percent) more than it was in mid-2019; its maker, J.M. Smucker, said shelled peanut prices rose about 44 percent. 

Welch's, whose grape jelly went up almost 68 percent since mid-2019, said many farmers in its cooperative went into the pandemic already financially struggling, prompting the company to "increase returns to growers" to sustain those family farms.

Many brands also said Walmart is the final arbiter of prices on its shelves.

Walmart does have the power to sell some popular items at break-even prices or even below cost, making up for the lost profits by charging a bit more for other products. But overall, supermarket prices are a complex amalgam of both the expenses and markups of manufacturers, wholesalers and the retailer as they respond to a myriad of factors, including harvests, seasons and shoppers' loyalties.

Walmart, as the largest U.S. retailer, tends to extract lowest-priced deals from suppliers. In November, 

 the chain had lowered prices on 6,000 items, half of which were groceries. Walmart's scale also enables it to keep prices as stable as possible, which was a key reason NPR chose the chain for this project.

"We are committed to providing an Every Day Low Price experience both in stores and online," a Walmart representative said in a written statement to NPR, "with the goal of having the lowest price on a basket of goods over time."

NPR's shopping cart: How prices have changed since 2023

Credit: Research and analysis by Alina Selyukh/NPR. Graphics by Juweek Adolphe/NPR

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NPR has tracked the prices of dozens of items at the same superstore in Georgia, including eggs, T-shirts, snacks and paper towels. Here's what got cheaper over the past year, and more expensive.

NPR shopped for 96 items at Walmart to track how prices are really changing

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