Refer to the following mentioned data. (In millions) 2019 $ 30,109 -13,007 2018 $ 26,143 13,982 2020 Net sales $ 34,582 Cost of products sold 14,510 Gross margin $ 20,072 $ 17,102 $ 12,161 Required: a. Calculate the gross profit ratio for each of the past three years. b. Assume that Campbell's net sales for the first four months of 2021 totaled $12.62 billion. Calculate an estimated cost of goods sold and gross profit for the four months, using the gross profit ratio for 2020. Complete this question by entering your answers in the tabs below. Required A Required B Assume that Campbell's net sales for the first four months of 2021 totaled $12.62 billion. goods sold and gross profit for the four months, using the gross profit ratio for 2020. Note: Round intermediate calculations to 2 decimal places. Enter your answers in millions (i.e., 5,000,000 should be entered as 5). Cost of goods sold Gross profit million million < Required A Required B