I understand that it is hard to predict what is behind old units and appliances etc but the amount of a third is quite a lot. The estimate says to supply and fit a xxx kitchen with gas hob electric cooker and extractor. I find that an amount of some £120 has been added for connecting the gas hob to the gas supply but I thought that that would be included Extra charge for hinges but surely they would be included in the kitchen fitting? £200 extra for electrics with a third socket having to be put in for the extractor but that would have been obvious at the start? Then £500 for a new electric circuit board.