US consumers may finally be getting some relief from their grocery bills — especially if they shop for food online.

While each fulfillment method grew, Delivery contributed more than half of the overall sales gains for the month, increasing 10.2% versus last year to $3.9 billion, propelled by a continued surge in the number of monthly active users (MAUs).

Shoppers who buy their food online saw some relief at the checkout line in August, according to new numbers released Tuesday by Adobe's Digital Price Index.