CPI

a self-report personality inventory originally derived from the MMPI; consists of several hundred yes-no questions and yields scores on a number of scales including dominance and self acceptance and self control and socialization and achievement etc.
an index of the cost of all goods and services to a typical consumer
consumer price index is a monthly measure of price fluctuations compiled by Statistics Canada. The consumer price index measures the retail prices of a "basket of goods and services" including food, transportation, housing, clothing, etc. The consumer price index is weighted (each of its components has different weight in the calculation).