Final answer:
The best way to calculate the inflation rate for a given period when considering a major purchase is by tracking changes in the Consumer Price Index (CPI).
Step-by-step explanation:
The best way to calculate the inflation rate for a given period when considering a major purchase is by tracking changes in the Consumer Price Index (CPI). The CPI is a measure of inflation and is based on the prices of a fixed basket of goods and services that represents what the typical consumer buys.
By monitoring the CPI, you can get an accurate understanding of how prices have changed over time, which will help you determine the inflation rate for the period you are interested in.