Answer:
a. PPI or Producer Price Index because it measures the input used for production.
b. CPI or Consumer Price Index because it measures the cost of common household purchases.
Explanation:
Inflation is general rise in the price level. There are various measures of inflation such as CPI, RPI, CPIX, CPI-CT and core inflation. This inflation measure selection is based on the scenarios by which criteria is made for selection. The businessmen will measure inflation with a different method as compared to a common man.
a. A factory owner will measure the inflation based on PPI. Producer price index measures the change in price of goods sold by manufacturer.
b. A teacher union will measure the inflation as CPI. Consumer price index is the best measure of inflation for a consumer.