Yes, I'll start and anybody else here can chime in. I think of cost Joe, in four or five different buckets, one being - what are the things outside our control that are - have been kind of gummies for us that will obviously take but we really haven't done anything to earn them. And in that category are things like Frank mentioned, diesel. Mexican peso has been a good tailwind although most companies seem to have more international operations and we do most of our operations here in the U.S. So we don't have as much of an FX benefit as maybe some. The second benefit - sorry, the second bucket of cost that I think about are sort of just like the dollar, hard dollar savings, and those have been in areas like labor. Frank mentioned, our headcount at Palmarejo as we've transition and keep transitioning away from the open pit has come down a lot. The maintenance cost Frank mentioned, the power at Palmarejo which is a huge component of the of our cost, freights up at Kensington, those kind of things that are just pure dollar savings and while those are great and we've definitely been aggressively pursuing those, those have limits, you can't couple it quarter-in and quarter-out forever. And that's where I get more excited about the other two or three buckets; the first being coming from grade, the next one coming from scale, and then the third one coming from processing related enhancements, and that's really for us the next wave of - that's going to deliver cost reductions for us. For us grade for example; we haven't even gotten into Independencia yet and that's where some of that real grade kick is going to come home at Palmarejo and really drive those costs down even further. In terms of scale, we're just invested like I mentioned in expanding that pressure capacity out of Rochester, that higher scale and the volume efficiencies that come along with things like that, that's going to be another - give us another wave of opportunity on the cost front. And then, Frank and his team on the processing side - when you look at those Palmarejo recoveries in the third quarter, that stems from a lot of hard work, a lot of effort, there is some more tweaks to be done in 2016, 2017 that can give us some more benefit there. We're looking at some opportunities at San Bartolomé to improve recoveries to the addition of some oxygen into the processing plant there to hopefully boost recoveries, and that's - I mean those are the sweet - kinds of kickers to cost in terms of more capital or no capital, every 2%, 3%, 4%, 5% on recoveries makes a huge, huge difference in terms of unit costs and cash flows. Frank, I probably just stole 100% of your thunder there.