Based on the information contained in these financial statements (for amazon use values for december 31, 2016 and for wal-mart use values for january 31,

determine the following values for each company. (round all percentages to 1 decimal place, e. g. 17.5%.)
(1) profit margin for 2016. (for amazon, use "total net sales.") (show decrease with either a negative sign, e. g. -15.2% or in parentheses, e. g. (15.2)%.)
(2) gross profit for 2016. (enter amounts in millions.)
(3) gross profit rate for 2016.
(4) operating income for 2016. (enter amounts in millions.)
(5) percentage change in operating income from 2015 to 2016. (show decrease with either a negative sign, e. g. -15.2% or in parentheses, e. g. (15.2)%.)