Problem
The Lim family consumes only apple juice, bananas and rice in a year. Prices in the base year are $4 per litre of apple juice, $3 per kg of bananas and $5 per kg of rice.
In 2018 (base year), the Lim family spent $40 on apple juice, $45 on bananas and $25 on rice. In 2019. the price of apple juice was $3 per litre, the price of bananas was $4 per kg and the price of rice was $7 3 kg.
Calculate the Consumer Price Index (CPI) for the Lim family. [State the formula and show full workings]. State the final answer in a complete sentence, correct to one decimal place.