($ millions) For Year Ended December 31 a. b. 2014 2013 Operating? Nonrecurring? Net sales $58,167 $57,080 Yes = No Cost of sales 47,464 47,594 Yes = No Research and development expenses 1,647 1,747 Yes = No Selling, general, and administrative expenses 3,106 3,024 Yes = No Amortization of intangibles 436 461 Yes = No Goodwill and other intangible asset impairment losses 50 -Yes Yes Restructuring charges (credits) (3) (22) Yes = Yes Asbestos-related charge 78 -Yes Yes Equity in earnings of nonconsolidated affiliates 835 1,034 Yes = No = Sundry income (expense)-net (27) 2,554 No = No Interest income 51 41 No No Interest expense and amortization of debt discount 983 1,101 No = No Income before income taxes 5,265 6,804 Provision for income taxes Net income 1,426 1.988 Yes $3,839 $4,816 = No c. Compute net operating profit after taxes (NOPAT) and net operating profit margin (NOPM) for each year. Assume a statutory tax rate of 35%. 2014 2013 NOPAT (Round your answer to the nearest million dollar.) $ NOPM (Round your answer to one decimal place.) 4,032 x $ 7.7% 4,872 x 8.6 % *