So I'll add just a little bit to that answer, which is an excellent answer. Interestingly and not surprisingly the consumer book sales numbers, industry numbers, have been points of purchase inventory numbers have continued relatively strong through this period of time. I'm not surprised by people at home, they go online, they buy books. The channel mix of course has changed. But the volumes have been very good and that's very hard, people like books, they keep buying them. And particularly in the categories that we are in, the segments we focus on in the consumer business, business books and that sort of thing, are our strong categories that continue to grow. On the education side, it’s a very, very thin period right now for book sales. This is not a time when college books, when college students are buying books, which is good. It means that during the peak of the COVID period, you're not worried about losing the bulk of the year. But it will point back to, from an inventory perspective, it'll be very interesting to see what happens in August, because that's when bookstores stock up for the college fall season. So that will be an interesting thing to watch. And that will be completely a function of the enrollment that they've secured between now and then, because that's how it works. They basically say we're going to have this many students in the classroom and we're going to order this many books. So, really it’s fall enrollments that will drive that and we won't have a sense of inventory until we get to August. But that will be good indicator, very good indicator, for us to look at. Having said that, we are seeing significant movement, as I indicated in my remarks, toward the digital material, the digital courseware, that have been growing nicely for the last few years and that have accelerated now. So, there maybe an enhanced shift, which if you've been following that we've been talking about, or the story that we've been talking to for the last couple years. As we move to those digital materials, we may lose a unit at a relatively high price in physical prints. But as we do, we gain multiple units of digital, because the sell-through is 3 times as high, because of the lack of substitutes for the digital courseware. And so we like that shift and so if we see some inventory and ultimate sell through problems in this fall, some of that will come back to us. We're hoping a lot of it will come back to us in digital. But the key number to look at and as we think about leading indicators is fall enrollment, it's all about the fall enrollment in the college business.