(S (S (NP (BASENP (NN Energy) (NN company) (NN watchdog)) (NP (NP (BASENP (DT the) (NNP Office)) (PP (IN of) (BASENP (NNP Gas) (CC and) (NNP Electricity) (NNPS Markets)))) (PRN (LRB -LRB-) (BASENP (NNP Ofgem)) (RRB -RRB-)))) (VP (VBP have) (VP (VBN estimated) (SBAR (IN that) (S (BASENP (NN energy) (NNS companies)) (VP (MD will) (VP (VP (VP (VB make) (NP (BASENP (JJ gross) (NNS margins)) (PP (IN of) (NP (NP (BASENP (NN ￡) (NN 170)) (PRN (LRB -LRB-) (BASENP (DOLLAR $) (NN 276)) (RRB -RRB-))) (PP (IN per) (BASENP (JJ dual) (NN fuel) (NN customer))))))) (PP (IN over) (NP (BASENP (DT the) (NN course)) (PP (IN of) (BASENP (DT the) (JJ next) (NN twelve) (NNS months)))))) (COMMA ,) (PP (IN due) (PP (TO to) (NP (BASENP (DT the) (JJ recent) (NN fall)) (PP (IN in) (BASENP (NN wholesale) (NN energy) (NNS costs))))))))))))) (PERIOD .))