The following income statement data for AT\&T inc, and Verizon Communications Inc, were taken from their recent annual reports (in millions): \begin{tabular}{lrr} & AT\&T & Verizon \\ \hline Revenues & $170,756 & $130,863 \\ Cost of services (expense) & 79,419 & 55,508 \\ Selling and marketing expense & 36,765 & 31,083 \\ Depreciation and other expenses & 28,476 & 21,994 \\ Operating income & $26,096 & $22,278 \end{tabular}