According to Walmart Blog Post,
We’re kicking off some awesome deals this week that will be available for everybody with no hidden costs or admission fees, and they won’t be available for just one day. Our customers will see thousands of great deals on Rollback beginning this week along with some special atomic deals (more on that in the days to come). In addition, we’re rolling back our free shipping minimum order to $35 from $50, making it even easier for customers to save on shipping all summer long.
So, also don’t forget to check out Walmart 15 July sale page Wednesday to grab great deals.