Suppose in the base year, a typical market basket purchased by an urban family cost $250. In year 1, the market basket cost $950. ( for full credit, show all your work including the formulas)
1) What is the CPI for year 1?
2) If the same market basket cost $1000 in year 2, what is the CPI for year 2?
3) What was the year 2 rate of inflation (compared to year 1) ?