Use Shoppers' financial statements to respond to the following:
a. Calculate the gross margin for fiscal 2011 and 2010.
b. Calculate the gross margin percentage for fiscal 2011 and 2010.
c. Interpret your calculations in (a) and (b) above. What do they tell you about Shop pers' performance? What additional information would you want to do a more thor ough evaluation of Shoppers' gross margin?