So we're forecasting around $1,400. The inflation is -- basic inflation CPI over the last 3 years is substantial in the 20s. And mining has been higher. So -- and we've -- and on top of that, we've dropped the grade from the grades that were mined in a lot of the Barrick mines when we took over. So we've squeezed that margin and delivered more efficiency. And that's the optimum way to manage ore bodies. And so for us -- and when you look at it, and I'll pass it on to Simon to explain briefly, but again, we're going to spend a lot of time on this in the Investor Day. But at $1,400, we deal on all our major deposits. We can manage it. And it delivers real returns over the whole life of those reserves. And that's the way we test it. So you mustn't confuse -- so we have always stuck to the reserve price that delivers our ore bodies, our world-class ore bodies. If you go higher in all our major ore bodies, so Nevada, PV, Kibali, Loulo-Gounkoto, Porgera, all the big deposits, Veladero, we would move out of the ore body and you dilute the grade. And so when you do that, you dilute the NPV, the value of the asset. And so we manage that. And when we run our budgets, we always use the reserve grade, and -- because why it highlights the gaps and the issues, whereas if you run our mines at $1,900, you can't see what's good and bad. And then we lift that price, the commodity price, whether it's gold or copper to closer to the spot for the next year. That's the way we run it, and we use consensus on the long term on the valuations. So that's how we manage our business. There's a lot more to it, and we'll -- and copper is slightly different because both feasibility studies are being run at $3 and all our mines work at $3. In a year's time, we might well adjust that because we know that, that will still keep the ore bodies intact, and it won't push us outside the ore body. And if you follow the strict science and you overstate the gold price, what you do is you need to put in extra capital to be able to deliver the same production profile. So that -- as a high level, that just explains where we are. I think the rest, I'll leave to Simon to take you through in some detail at our Investor Day.