Can someone please help with A, B and C listed below?

BYP14-1 The financial statements of Shoppers Drug Mart are presented in Appendix A at the end of this book. The fol lowing selected condensed information (in thousands) has been taken from these, and the prior years, financial statements: 2012 2011 2010 Income statement Sales Cost of goods sold Gross profit Operating expenses Profit from operations Interest expense Income tax expense Profit $10,781,848 6,609,229 4,172,619 3,291,698 880,921 57,595 214,845 608,481 $10,458,652 6,416,208 4,042,444 3,131,539 910,905 64,038 232,933 613,934 $10,192,714 6,283,634 3,909,080 3,011,758 897,322 60,633 244,838 591,851 Statement of financial position Current assets Non-current assets Current liabilities Non-current liabilities Shareholders' equity $2,764,997 4,708,724 2,334,917 815,477 4,323,327 $2,695,647 4,604,663 1,776,238 1,256,242 4,267,830 $2,542,820 4,501,377 1,527,567 1,413,995 4,102,635 Instructions (a) Using horizontal analysis, calculate the percentage of the base-year amount for the information shown above, assuming 2010 is the base year (b) Using vertical analysis, calculate the percentage of a base amount for each of the (1) income statement and (2) statement of financial position, shown above for each year (c) Comment on any significant changes you observe from your calculations in parts (a) and (b)