Complex sentence: On December 18, the Junta declared in favor of the union and the oil companies had to pay 26 million pesos of lost salaries during the strike but they appealed to the Supreme Court.
Split into simpler sentences: On December 18, the junta declared in favor of the union. The oil companies had to pay 26 million pesos of salaries lost because of the strike, but they appealed to the Supreme Court.