The condensed income statements through income from operations for Apple Computer Co. and Dell Inc. are reproduced below for a recent fiscal year (in millions):

Prepare comparative common-size statements, rounding to one decimal place. Interpret theanalyses.

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Apple Sales Cost of goods sold Gross profit Operating expenses: Computer C Dell Inc. $49,205 40,190 $ 9,015 $8,279 6,020 $2,259 Selling, general, and administrative expenses Research and development expense Other expenses $1,421 489 23 1,933 326 4,298 463 Total operating expenses Income from operations 4,761 4,254