Calculate RONA's gross margin for fiscal 2010 and 2011. Assuming that all other expenses remain the same,

Question:

Calculate RONA's gross margin for fiscal 2010 and 2011. Assuming that all other expenses remain the same, what would RONA's net income or loss before taxes have been if it had the same gross margin in 2011 as in 2010? What would net income before taxes have been had the 2010 gross margin been the same as in 2011?