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Dive Brief:

By the numbers
 
20%
Walmart’s year-over-year increase in orders per store-fulfilled delivery in Q3 
 
30%
The share of orders from customers who paid more to have their items delivered in three hours or less
 
40%
The reduction in net delivery cost per order in the U.S. for Q3
 
50%
The percentage of volume Walmart is handling in an automated fashion in its fulfillment centers

Dive Insight:

Walmart has made steady progress in reducing its last-mile delivery costs this year as it grows its online shopper base, helping the retailer spread out expenses among more customers.

Store-fulfilled delivery sales for the company jumped nearly 50% year over year in Q3 and surpassed a $2.5-billion monthly run rate, Rainey said.

"We've now had 12 consecutive months of deliveries above $2 billion," he added.

The sales growth comes as Walmart has expanded its roster of U.S. stores that offer delivery from 4,200 in Q3 of last year to 4,500, according to an earnings presentation.

While Walmart is pushing for more efficient delivery operations from these stores, it's not looking to sacrifice speed in the process. More than 30% of store-fulfilled deliveries are coming from customers who paid more to have their items in less than 3 hours, or even within the hour, according to Rainey.

"If investments in delivery speed cause us to reach profitability a little later, that's fine too," Rainey said of the company's e-commerce business. "We want to deliver faster. So I think we are very confident that we're going to make money in e-commerce."

Fast delivery is a priority for Walmart amid its growing competition with Amazon. President and CEO Doug McMillon said in May that Walmart delivered 4.4 billion items with either same-day or next-day shipping speeds in the U.S. in the prior 12 months. While McMillon didn't provide an update on the stat in Tuesday's call, he did say delivery speeds are "becoming increasingly important to customers."