S-I/A Table of Contents Selling, general, and administrative Year ended December 31, Percent Change tin millions) Salaries, wages, bonus, and other ISO commissions Outside professional services Internal sales commissions Other Selling, general, and administrative expense 2014 2013 2012 2014 vs. 2013 2013 vs. 2012 $ 741 $ 742 $ 700 —% 6% 587 579 563 1% 3% 216 196 199 10% (2)% 147 136 152 8% (11)% 352 327 299 8% 9% $2,043 $ 1.980 $ 1913 30/* 4% Selling. general. and administrative expense increased in 2014 compared to 2013 largely due to growth in payments to independent sales organizations resulting from increased transactions and volumes, higher legal fees of $6 million, and expenses incurred throughout 2014 related to the transition of several corporate functions from Denver to Atlanta in the amount of $6 million. Other, which includes advertising and promotional expenses, business travel and entertainment expenses, and other selling expenses. increased mainly due to increased marketing expenditures of $22 million related to new products. Internal sales commissions expense increased due to increased sales. Selling, general. and administrative expense increased in 2013 compared to 2012 largely due to expense related to increased sales staff of $9 million, litigation expense of $8 million. stock compensation expense of $26 million, additional non-payroll taxes of $3 million, and a $16 million increase in ISO commi ions, partially offset by reduced internal sales commissions of $16 million due to lower payouts related to lower sales volume. The remaining difference is driven by numerous immaterial items included in other. Reimbursable debit network fees. postage. and other expense increased in 2014 and 2013 due to transaction and volume growth related to debit network fees partially offset by changes in regulated financial institution mix. Reimbursable debit network fes. postage. and other increased in 2013 com