part B please

Refer to the following mentioned data. Net sales cost of products sold Gross margin (In millions) 2017 2016 2015 $34,216 $30,010 $26,307 14,835 13,286 13,280 $19,381 $16,724 $13,027 Required: a. Calculate the gross profit ratio for each of the past three years. (Round your answers to 2 decimal places.) 2017 2016 2015 56.64% 55.73% 49.52% b. Assume that Campbell's net sales for the first four months of 2018 totaled $12.55 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