Yes. I think what it means is a lot of what you said, and when you look at the areas that I called out in the prepared comments, when you think about retention, and our retention getting significantly better than it has, it does multiple things. One, you don't spend the dollars you have to spend to hire somebody, just the actual hard cost of getting somebody into the system whether you do a background check or any kinds of other screenings on the individual, getting them through a training program and then getting them on to the sales floor, at a productivity level lower than someone who has 6 or 9 months experience. So when you have more and more people who have that 6 to 9 months experience and start to get to the 12 months experience, that helps the productivity inside the store. More people then wind up staying, particularly the part-time workforce, as they start to understand and appreciate, when they're here 6 months, they start to get the benefit of Feed Your Future where they can get $3,500 a year towards furthering their education. That cost, while it sounds expensive, actually will be offset by that person staying for another 12 or 18 months versus having that person turn a couple of times and having lower productivity and training. So you kind of create a virtuous cycle and better opening wage rates, more contemporary benefits, helping them with their college education or GED or English as a second language. We have a lot of folks here work for Kroger in management positions that have decided to go back and get their MBA and other advanced degree certification. So all of those together help with that. We continue to see improvements in our cost to filling our pharmacies. Our pharmacy business continues to be a very strong piece. Our script count on a 30-day adjusted basis continues to grow nicely. And as we leverage that and are able to leverage down our cost to fill prescriptions, that certainly helps. And then the efforts we've had both on our front-end transformation that we tried to work in with space op, when possible, of reconfiguring the self-checkout units so that it's an easier, a more friendly experience for our customers. And then the added benefit of the Scan, Bag and Go, all of those help create productivity, which is a positive to it. A lot of things I said there. I don't know that I would promise 20- basis points going forward, but certainly cost reduction as we've been talking since we announced Restock Kroger on October '17 is a very important part of getting the $400 million of operating profit.