Analyze and compare Amazon.com, Best Buy, and Wal-Mart

The condensed income statements through operating income for Amazon.com, Inc. (AMZN), Best Buy Co., Inc. (BBY), and Wal-Mart Stores, Inc. (WMT), for a recent fiscal year follow (in millions):

	Amazon	Best Buy	Wal-Mart
Sales	$135,987	$ 39,403	$ 485,873
Cost of sales	(88,265)	(29,963)	(361,256)
Gross profit	$ 47,722	$ 9,440	$ 124,617
Selling, general, and administrative expenses	(43,369)	(7,547)	(101,853)
Operating expenses	(167)	(39)	0
Operating income	$ 4,186	$ 1,854	$ 22,764

1. Prepare comparative common-sized income statements for each company. Round percentages to one decimal place. If percentages is zero, enter "0". For those boxes in which you must enter subtracted or negative numbers use a minus sign.

Comparative Income statements
	Amazon	Best Buy	Wal-Mart
Sales	%	%	%
Cost of sales	%	%	%
Gross profit	%	%	%
Selling, general, and administrative expenses	%	%	%
Operating expenses	%	%	%
Operating income	%	%	%