2. Calculating inflation based on CPI The basket of goods and services used to calculate the CPI in the Republic of Exonia is: four loaves of bread two shirts three packets of toilet roll Last year's prices were: $2 for a loaf of bread $10 for a shirt $6 for a packet of toilet roll This year's prices are: $3 for a loaf of bread $12 for a shirt $9 for a packet of toilet roll What is the inflation rate, as measured by the CPI, between last year and this year