Answer:
d. All of the above are correct.
Explanation:
CPI or consumer price index is a numerical measure of the rate of inflation in a country over time. CPI is calculated with a reference year as the base year.
The CPI for the base year is always set at 100. For the subsequent years, CPI is calculated using the formula below.
consumer price index=cost of the market basket in a given year x100
cost of a market basket at the base
Therefore, in 2012 CPI will be 100 since its base year.
In 2013, the CPI will be
84/80 x 100
=1.05 x 100
=105
In 2014, the CPI
= 87.60 /80 x 100
=1.095 x 100
=109.5