[(field3+field6+field9+field14+field15+field16+field17+field18+field19+field20+field21+field22+field23+field24+field25+field26+field27+field28+field29+field51+field50+field49+field48+field47+field45+field46+field44+field43+field42+field38+field37+field41+field40+field36+field34+field35+field33+field32+field31+field30)/40*100]%