谁能用英语介绍CPI，要全文英语，不是CPI的全称是什么

谁能用英语介绍CPI，要全文英语，不是CPI的全称是什么

Abbreviation for the Consumer Price Index CPI, is living in accordance with the related products and services price index statistics out of the price changes are usually observed as an important indicator of the level of inflation.
CPI is calculated using CPI = (a fixed set of goods at current prices the value / commodity at a fixed price base period value) × 100%. Uses a fixed weight index of the weighted arithmetic mean formula, ie K pull = ΣKW / ΣW, a fixed weight of W, in which the molecular formula of K for a variety of individual sales index. CPI said that the expenditure for ordinary families, the purchase of a representative group of commodities, today more than ever how much a certain time, for example, if a country in 1995, the average family to buy a set monthly cost of goods 800 yuan, while in 2000 the cost of goods purchased in this group of 1,000 yuan, the country's consumer price index in 2000 is (in 1995 as the base year) CPI = 1000/800 × 100% = 125%, that is up (125-100)% = 25%. In daily, we are more concerned about inflation, which is defined as from one period to another period percentage change in price level, the formula is T = (P1-P0) / P0, T is a formula in the period of currency expansion, P1 and P0, respectively, a period (on behalf of the reporting period) and 0 time (on behalf of the base period) the price level. Described above if the consumer price index to measure the price level, the inflation rate is at different times of the percentage change in consumer price index. If an economy's consumer price index increased from 100 last year to 112 this year, then the rate of inflation during this period is T = (112-100) / 100 × 100% = 12%, that inflation was 12%, showed prices up 12%.