$21.8 million. primarily related to the internal development of software to support our products and services. Net cash used in investing activities in 2013 includes acquisitions of $32.1 million, which include Twoo. and capital expenditures of $19.8 million primarily related to the internal development of software to support our products and services. Net cash used in investing activities in 2012 includes acquisitions of $59.5 million, primarily related to Tutor.com and Dale Hookup, and capital expenditures of $19.9 million primal* related to the internal development of software to support our products and services. Cash flows used in financing activities Net cash provided by financing activities in the nine months ended September 30, 2015 includes net cash transfers of $75.9 million from IAC and $31.3 million in excess tax benefits from stock-based awards, partially offset by $5.5 million in contingent consideration payments. The net cash transfers include a $155.0 million capital contribution to partially fund the Plenty0IFish acquisition, partially offset by cash transfers to IAC of $79.1 million that relate to IAC's centrally managed U.S. treasury management function. Net cash provided by financing activities in the nine months ended September 30. 2014 includes $119.1 million in proceeds from the issuance of related party debt, the return of $12.4 million of funds held in escrow related to the Meetic tender offer and $5.3 million in excess tax benefits from stock-based awards, partially offset by cash transfers of $80.8 million to IAC, $30.3 million for the purchase of noncontrolling interests and $7.4 million in contingent consideration payments related to the 2013 Twoo acquisition. Net cash used in financing activities in 2014 includes cash transfers of $108.1 million to IAC, $33.2 million for the purchase of noncontrolling interests in Tinder and Meetic and a $7.4 million contingent consideration payment related to the 2013 Twoo acquisition, pa