Very simply, there are two ways of measuring prices. One is a consumer price, such as the consumer price index, so it represents the increase in prices for a basket that is deemed to be representative. The other way of measuring prices is in terms of producer prices, the price of goods that are being produced by manufacturers, by the service sector. This chain price index is a producer price index linked to our national account. So they're conceptually quite different, and this chain price index can be very much affected by the swings in trade that we've been talking about.
So it is a technical question. That's a technical response. It's the difference between a consumer price and a producer price.