Ratios provide the users of financial statements with a great deal of information about the entity. Do ratios tell the whole story? How could liquidity ratios be used by investors to determine whether or not to invest in a company? and Profit Margin Year Ending December 2012 Year Ending December 2011 Year Ending December 2010 Revenues 40,000 35,000 33,000 Operating Expenses Salaries 15,000 10,000 9,000 Maintenance and Repairs 6,000 9,000 10,000 Rental Expense 2,500 2,500 2,500 Depreciation 2,000 2,000 2,000 Fuel 4,000 3,500 2,500 Total Operating Expenses 29,500 27,000 26,000 Operating Income 10,500 8,000 7,000 Sales and Administrative Expenses 6,000 4,000 3,000 Interest Expense 2,500 2,000 1,000 Net Income 2,000 2,000 3,000 Above is a comparative income statement for Cecil, Inc. for the years 2010, 2011, and 2012. Calculate the net-profit margin for each of these years. Comment on the profit margin trend.