Using the data provided in Table 1, prepare common size income statements using revenues and cost-of-goods-sold in the original S-1 and amended S-1. Analyze trends of expenses as a percentage of revenue for 2009 and 2010.

Abridged Income Statements for Groupon This information was obtained from Groupon's S-1 filing with the SEC on June 2, 2011, and the amended filing (Amendment No. 4) on October 7, 2011