sentences:  On 18 August 2014, a senior defence ministry official said a draft contract was being finalised and that the Cost Negotiations Committee was expected to file a final report shortly.Other ministry sources said the ministry was requesting Dassault to revise its pricing structure, as the estimated price had increased to from the original estimate of envisioned in 2007.On 2 September, the Chief of Air Staff, Air Chief Marshal Arup Raha, said the contract was expected to be signed "soon," and further stressed the importance of keeping the Rafale deal, by then estimated to cost .