With a store location within 10 miles of 90% of the United States population, that process has been made easier thanks to proximity. Many of Walmart's stores now double as warehouses; the retailer uses its massive footprint to double as last mile fulfillment stations.

While the cost of some items will be dropping, CNBC reports certain grocery items such as dairy products, meats and eggs continue to rise in cost for the retailer, leading to rising costs for consumers. Walmart CEO Doug McMillon says he’s spoke with suppliers about lowering costs and says those companies can do more to help consumers.