Selected data from the September 26, 2020, and September 28, 2019, consolidated balance sheets and income statements (statements of operations) for the years then ended for Apple Incorporated follow. All amounts are reported in millions. Required: a. Calculate the amount of Apple's gross profit for each year. Has gross profit as a percentage of sales changed significantly during the past year? o. Calculate the amount of Apple's operating income for each year. Has operating income as a percentage of sales changed significantly during the past year? c. After completing requirements a and b, calculate the other missing amounts for each year. Complete this question by entering your answers in the tabs below. Calculate the amount of Apple's operating income for each year. Has operating income as a percentage of sales changed significantly during the past year? Note: Enter your answers in millions of dollars