1.Compute gross profit (or margin) percentage (Gross margin/Sales) for each quarter forfiscal years2006 and 2007. Is thegross profit percentagein the fourth quarter substantially different from other quarters? attachment

Toys \"R\" Us is the biggest toy store chain in the United States, with significant operations outside the United States as well. The following quarterly financial data were taken from the 2007 annual report of Toys \"R\" Us. First Quarter Second Quarter Third Quarter Fourth Quarter 2007 Net Sales 2007 Gross Margin $2,581 910 $2,605 936 $2,781 977 $5,827 1,984 2007 Net Earnings/(Loss) (41) (42) (76) 312 2007 Net Sales 2,405 2,432 2,534 5,679 2007 Gross Margin 849 848 861 1,854 2007 Net Earnings/(Loss) (45) (111) 41 224