Revenue and expense data for Mandell Technologies Co. are as follows:

a. Prepare an income statement in comparative form, stating each item for both 2012 and 2011 as a percent of sales. Round to one decimal place.
b. Comment on the significant changes disclosed by the comparative incomestatement.

Sales Cost of goods sold Selling expenses Administrative expenses Income tax expense 2012 $800,000 504,000 120,000 128,000 33,600 2011 $740,000 407,000 140,600 125,800 48,100