What was the amount of depreciation and amortization expense for each of the 3 years 20122014? (Hint: Use the statement of cash flows.) (Enter the amounts in millions.)

Depreciation and amortization expense

2012 $ _________

2013 $ _________

2014 $ _________

Cost of sales 112,258 106,606 87,846 Operating expenses Selling, general and administrative 11,993 10,830 10,040 Operating income 52,503 48,999 55,241 Income before provision for income taxes 53,483 50,155 55,763 Net income $ 39,510 $37,037 $41,733 Basic $ 6.49 5.726.38 Shares used in computing earnings per share Diluted 6,122,663 6,521,634 6,617,483