The economy of tuland produces only two products shirts and watches. the following information is available for production and prices of tuland's products for the years 2009 and 2010. 2009 2010 quantity of shirts 200 210 quantity of watches 60 69 price of shirts $10.00 $11.50 price of watches 40.00 $43.20 the geometric average of the two inflation rates (using 2009 as base year and the one using 2010 as the base year) is equal to