Acknowledging the difficult economy, the St. Petersburg Area Chamber of Commerce said Friday it cut five of its 12 staff jobs to further reduce expenses and help streamline the organization. Chris Steinocher, who joined the group as CEO in January, said the chamber hopes to tap more of its membership expertise on a volunteer basis to help create more focused programs. The job cuts were necessary to put the chamber's finances on a more sustainable basis, said chamber chairman and Progress Energy vice president Mark Wimberly. This is the second cut of chamber personnel within the past six months. Last November, the chamber cut its staff from 17 to 12 positions.