Yes. So, obviously, a lot of the disruption we're expecting to see this year is going to be around brokerage service lines. And brokerage service line compensation does vary, as you mentioned, by region, by business and it does vary a bit in the U.S. It's substantially all commission-based systems. So, obviously, those commissions come down as revenue comes down. It's essentially a variable cost. In Europe and certain parts of Asia, there's a profit share-type arrangement for a lot of the fee owners. So, again, as profit essentially gets reduced by lower revenue. We would expect profit share to be reduced as well. So that's kind of a variable -- it doesn't come down as much as revenues, it comes down with sort of profit that they share in. So that's how that gets reduced, but, obviously, that's going to get reduced substantially as revenue comes down. And then there are other commission arrangements, different kinds of arrangements, some salary and bonus type arrangements, rather smaller in nature. But generally speaking, those people who are kind of facing brokerage type revenues and reductions in that brokerage type revenue, we might expect to see then that that kind of cost is going to come out with that revenue, right? And then obviously we have some other costs in our PM/FM service lines, a lot of PM/FM is going to be frankly fairly stable over the year, but there will be some pockets where it goes up, some pockets where it goes down. In the areas where it's coming down there's a lot of direct client labor. There'll be consumable products. There'll be passed-through labor, third-party labor that's passed through. So that's all going to come out when the revenue comes out. So, that kind of -- there's a lot of cost depending on how much revenue comes out. There'll be a lot of direct cost comes out with that. When it comes to the cost actions we're taking, with respect to the $400 million of annualized savings we talked about, that is all coming out of what you might think of as fixed in the context, if it's not variable, right? Now some of it's -- some of its semi fixed, some of it is sort of fixed, right? So, obviously, there's a lot less activity around marketing, around travel and entertainment, around events. I mean, one could think of some of that as coming out, one could think of that as activity driven and somewhat semi-variables, semi-fixed in nature. But that's coming out as part of that $400 million of annualized we're talking about.