Dec 7 (Reuters) - Contact Energy Ltd CEN.NZ :
* Says does not expect its FY 2016 EBITDAF and UEAT to be materially different to FY 2015
* Says expect a marked increase in operating cash flow
* November commercial & industrial sales volumes were lower than the prior year
* Competition for mass market customers remains intense and although sales volumes are in line with prior year, tariffs were lower than expected
* Costs primarily related to bad debt and those associated with the separation from Origin Energy are higher than expected
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