Using the following data, compute total assets and total expenses. c. Compute net profit margin (net income/sa les) and total liabilities-to-equ ity rat.io (tota l liabilities/ stockho lders' equity). ($ millions) Total revenues Accumulated deprec iation . . . . .. . . . . . . . . . . . Depreciation and amortization expense . . . ... . Retained earnings . . . . . . . . . . . . .. . . . . . . . . . Net income . . . . . .. . . . . . . . . . . . . . .... . . . . . Property, plant & equipment, net . .. . . . . . . . . . Selling, general & admin istrat ive expense . . .. . Credit card receivab les . . . . . . . . . . .. . . . . . . . . Total liabilities . . . . . . .. . . . ... . . . . . . . . . ... . Stoc kholders' equity . . . . . . . . . . .. . . . . . . . . . Amount $71,960 13,31 1 2,142 13,155 2,999 30,653 14,914 5,841 31,605 16,558