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): eBook Print Item a. 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) \begin{tabular}{ccccc} \hline & Year 2 & Year 2 & Year 1 & Year 1 \\ Amount & Percent & Amount & Percent \\ \hline \end{tabular} Revenues: Product sales Service sales Total revenues Operating expenses: Cost of sales Fulfillment Technology and content Marketing General and administrative Other operating expense (income), net Total operating expenses Operating income $(165,536) %$(139,156) % (40,232) (34,027) % (35,931) (28,837) % (18,878) (13,814) % (5,203) (4,336) % (201) (296) %