Analyze Amazon.com Amazon.com, Inc. (AMZN) is the largest Internet retailer in the United States. Amazon's income statements through operating income for two recent years are as follows (in millions): Amazon.com, Inc. Income Statements For the Years Ended December 31 (in millions) Year 2 Year 1 Revenues: Product sales $160,408 $141,915 Service sales 120,114 90,972 Total revenues $280,522 $232,887 Operating expenses: Cost of sales $(165,536) $(139,156) Fulfillment (40,232) (34,027) Technology and content (35,931) (28,837) Marketing (18,878) (13,814) General and administrative (5,203) (4,336) Other operating expense (income), net (201) (296) Total operating expenses $(265,981) $(220,466) Operating income $14,541 $12,421 Required . Prepare a vertical analysis of the two income statements. Round percentages to one decimal place. Amazon.com, Inc. Income Statements For the Years Ended December 31 (in millions) Year 2 Year 2 Year 1 Year 1 Amount Percent Amount Percent Revenues Product sales $160,408 % $141,915 % Service sales 120,114 % 90,972 % Total revenues $280,522 % $232,887 % Operating expenses: Cost of sales $(165,536) % $(139,156) % Fulfillment (40,232) % (34, 027) % Technology and content (35,931) % (28,837) Marketing (18,878) % (13,814) % General and administrative 5,203) % (4,336) % Other operating expense (income), net (201) (296) % Total operating expenses $(265,981) % $(220,466) % Operating Income $14,541 % $12,421 %