Please solve part b. I have already done a.

Refer to the following mentioned data. Net sales Cost of products sold Gross margin (In millions) 2017 2016 2015 $34, 142 $ 30,284 $26,617 14,212 13,536 13,627 $19,930 $ 16,748 $ 12,990 Required: a. Calculate the gross profit ratio for each of the past three years. (Round your answers to 2 decimal places.) 2017 2016 2015 58.37% 55.30% 48.80 % b. Assume that Campbell's net sales for the first four months of 2018 totaled $12.71 billion. Calculate an estimated cost of goods sold and gross profit for the four months, using the gross profit ratio for 2017. (Round intermediate calculations to 2 decimal places. Enter your answers in millions rounded to nearest whole number (i.e., 5,000,000 should be entered as 5).) Cost of goods sold Gross profit million million