The correct answer to this open question is the following.
Although the question does not include options, we can answer the following.
The goal of a new Central American group formed as an economic union is to have a Council of Ministers that would coordinate the economic, social, and foreign policy of the member-states. This group wants to be a common market.
Four Central American countries signed the CACM, better known as the Central American Common Market, in December 1960. Those countries were Guatemala, Nicaragua, El Salvador, and Honduras. Two years later, Costa Rica became the fifth member of CACM. Its main goal is to support free trade between the region and is lead by the commerce or economic ministers of these five countries.