Profit % = $$\frac{Income\ -\ Expenditure}{Expenditure}\times\ 100$$. Using this formula, we can calculate uniquely the Expenditures for every year. The expenditures will be: 111.6, 65.3, 75.6, 56, 102.21 and 83.3 for the years 2003, 2004, 2005, 2006, 2007 and 2008 respectively. This gives the average amount of Expenditures = Sum/6 $$\approx\ $$ 82.2.
