Express the partial comparative income statements for Davis Company that follow as common-size statements and comment on the changes from 2011 to 2012. (Round computations to one decimal place.)

Davis Company Partial Comparative Income Statements For the Years Ended December 31, 2012 and 2011 Net sales Cost of goods sold Gross margin Selling expenses General expenses Total operating expenses Operating income 2012 212,000 127,200 S84,800 53,000 25,440 78,440 S6,360 2011 $184,000 119,600 64400 36,800 18,400 55,200 $ 9,200