S-I/A Table of Contrail Product sales and other revenue increased for the six months ended June 30, 2015 compared to the same period in 2014 due to growth in equipment sales of $34 million and a $45 million increase in software sales, partially offset by negative foreign currency fluctuations. Operating expenses overview Six months ended June 30, (In millions) 2015 2014 Percent Change Cost of services (exclusive of items shown below) $1.369 $1.300 5% Cost of products sold 16I 160 1% Selling, general, and administrative 1.046 1.010 4% fees, 1.799 1.805 —% Reimbursable debit network postage. and other Depreciation and amortization 503 528 (5)% Other operating expenses, net (a) 20 7 186% Total expenses $4.898 $4.810 2% (a) Other operating expenses. net includes restructuring, net. Cost of services expense increased for the six months ended June 30, 2015 compared to the same period in 2014 due to an increase in employee and contractor related expenses of $25 million as a result of product development initiatives The firs quarter of 2015 was negatively impacted by two customer related matters totaling $25 million. Additionally. in the first quarter of 2014, cost of services benefited by a combined $17 million from a tax recovery in Australia and a gain on the revaluation of settlement funds associated with the devaluation of the Argentina Peso. In addition, the rate of increase was impacted by a combined $18 million in expenses recognized during 2014 for uncollectible receivables and a legal reserve. The remaining difference is driven by numerous immaterial items. Cost of products sold expense increased for the six months ended June 30, 2015 compared to the same period in 2014 due to growth in equipment sales, partially offset by lower expenses driven by the strength of the U.S. dollar, which lowered these expenses by 6%. Selling. general. and administrative Six months ended June 30, (In millions) 2015 2014 Percent