The consolidated net income of Petrobras and its subsidiaries for 2006 was R$25.919 billion, a 9% increase over 2005. This was mainly due to a R$4.076 billion increase in gross profit from higher sales volumes and oil prices in Brazil and abroad. However, this was partially offset by higher expenses including write-offs of abandoned wells abroad, increased sales and administrative expenses, taxes, research and development costs, and other operating costs.