The expenditure behaviour of a typical student in 2005 and 2010 is summarized in the tables below. Expenditure Behaviour in 2005 Product Price Quantity per Month CD $11 per CD 4 CDS Pizza $11 per pizza 11 pizzas Notebook $6 per notebook 5 notebooks Expenditure Behaviour in 2010 Product Price Quantity per Month CD $7 per CD 4 CDS Pizza $13 per pizza 11 pizzas Notebook $6 per notebook 5 notebooks Assuming the base year is 2005, the CPI for the year 2010 is . (Round your response to one decimal place.)