For each fiscal year, the Secretary shall not be liable for any costs related to carrying out the Project in excess of those that the Secretary would have been liable for had the Project not been implemented, except for costs for evaluating the Project, but shall adjust for the full amount of the federal share of increases or decreases in costs that result from changes in economic, demographic, and other conditions in the State based on data specific to the State, changes in eligibility or benefit levels authorized by this chapter, or changes in amounts of Federal funds available to States and localities under the supplemental nutrition assistance program.