Yes, Dan. This is Ellis. So I'll speak a little bit more to the cost size and Steve can fill in the holes that I have if I miss anything. But again, as you noted, particularly in the fourth quarter last year, and throughout the year actually, 3 quarters, the last 3 quarters of the year, we're pretty careful in terms of managing costs and had a pretty, a very strong fourth quarter coming from cost control. A piece of that is what we internally call contingency plans, which is we carefully, in putting together a plan prototype our spending in terms of new investment in addition to headcounts and the like. And we do that every year, whether or not a year is going to -- turn out according to plan or not, as we've done in last year, which also started out a little bit on the weak side. This year as well. We're carefully watching and looking at investments in adding people and investments that are lower priority, let's say in terms of meeting our short, mid term and long-term goals and objectives, in terms of investing around digital transformation and transition. As you also know, that to your question about if you miss revenue, imagine costs, one of those elements of missing revenue is unfortunately incentive comp I guess it's fortunate or unfortunate, we have a fair amount of compensation that is related to performance. And to the extent we've missed any one of the 3 measures that drive that, one of which is revenue, the other is earnings per share, the third is cash flow, if we missed revenue significantly, that would release some incentive comp that otherwise would have been paid to colleagues back into earnings and would bridge some of that gap. One piece that Steve did mention and it's in the earnings release as well, that we can't really predict with any certainty has to do with foreign exchange effects on the bottom line. Both $3.50 to $3.55 was including the effect of foreign exchange, which was neutral for the first quarter of the year but as we exited the quarter, exchange rates particularly with respect to the euro, would have an adverse impact if it stayed where it is for the balance of the year. So that's Steve’s reference to being a headwind, is over the balance of the year that if rates stayed exactly where they are, we could come off of that number would be at the low end, more so than at the higher end.