of operations information: Revenue $ 713,449 $ 803,089 $ 888.268 $ 649,272 $ 752.857 Operating costs and expenses: Cost of revenue (exclusive of depreciation)(1) 72.794 85.945 120,024 82.079 131.118 Selling and marketing expense(1) 304,597 321,870 335,107 271,236 289.844 General and administrative