sentences:  Peru also became an associate member of MERCOSUR, a free trade zone that would be established gradually.The objective was for signing nations to gradually build up an infrastructure that would ease trade with one another, to cooperate in the improvement of energy efficiency, and to commit to future agreements that would increase cross border investment by eliminating double taxation.The Toledo administration held freetrade agreement talks with Singapore and Thailand, came to an agreement with Thailand on air transport, and signed an extradition treaty with South Korea.