Florida Power & Light and the state advocate for utility customers have reached agreement on about $1.3 billion in costs to restore electricity after Hurricane Irma, and on a system to better track expenses when major storms hit in the future.

The agreement between FPL and the state Office of Public Counsel was filed Thursday, five days before the scheduled start of a hearing at the Florida Public Service Commission to scrutinize the costs. Two business groups that are part of the case — the Florida Retail Federation and the Florida Industrial Power Users Group — had not signed onto the agreement Thursday, though it was not immediately clear how that could affect the commission’s handling of the settlement.