The CPI is a fixed-weight index. It compares the price of a fixed bundle of goods in one year with the price of the same bundle of goods in some base year. Calculate the price of a bundle containing 50 units of good X, 125 units of good Y, and 100 units of good Z in 2013, 2014, and 2015. Convert the results into an index by dividing each bundle price figure by the bundle price in 2013 and multiplying by 100. Calculate the percentage change in your index between 2013 and 2014 and again between 2014 and 2015. Was there inflation between 2014 and 2015?

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2013 Prices 2014 Prices $150 3.00 Quantity 2015 Prices Consumed Good х 125 50 $2.00 $2.00 100 0.75 1.50 1.25