The expenditure behaviour of a typical student in 2005 and 2010 is summarized in the tables below. Product DVD Pizza Pen Assuming the base year is 2005, the CPI for the year 2010 is Expenditure Behaviour in 2005 Price $28 per DVD $15 per pizza $2 per pen Expenditure Behaviour in 2010 Price $13 per DVD Product DVD Pizza Pen (Round your response to one decimal place.) Quantity per Month 3 DVDs 11 pizzas 5 pens $18 per pizza $7 per pen Quantity per Month 3 DVDs 11 pizzas 5 pens