Two years ago, the New York State Fair said it would spend $1.4 million from taxpayers for a new building to house Tully’s, a fair favorite known for its chicken tenders. But now that the new concession stand is complete, it turns out the final cost of the project is about $2.3 million, state contracting records show. That’s almost $1 million more than initially disclosed for the 2,740-square-foot building. The building is used only during the 13-day run of the fair.