The people who live on Shangri-La Island consume only rice and fish. Last year, which was the reference base year, the price of rice was $ a pound, the price of fish was $ a pound, and the average urban household spent $ on rice and $ on fish. This year, the price of rice is $ a pound and the price of fish is $ a pound. What is the CPI in the current year?

The consumer price index measures how the cost of a basket of goods in a given economy has changed over a given period of time. Changes in the cost of the basket of good occurs as a result of inflation.

CPI = (cost of basket of goods in current period / cost of basket of goods in base period) x 100

The basket of goods for the people of Shangri-La Island are fish and rice. The cost of a basket of good = average amount spent on fish + average amount spent on rice

Cost of basket of goods last year = $20 + 6 = $26

Cost of basket of goods this year = (price of fish this year x quantity of fish bought) + (price of rice this year x quantity of rice bought)

($7 x 2) + ($9 x 5) = $59

CPI in the current year = ($59 / $26) x 100 = 226.9

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