President Trump’s plan to save coal and nuclear power plants could cost a whopping $17.2 billion per year, a new study funded by opponents of the bailout said Thursday.

The report by the consulting and engineering firm Brattle looked at two scenarios to assess the possible cost of a Trump power plant bailout that range from $16.7 billion to 17.2, far exceeding a recent estimate from a coal group that said it would cost $4 billion per year.