“Adjusted final capitalized plant cost” means the final capitalized plant cost reduced by the following, without duplication and to the extent not already accounted for or reflected on the books of the facility: (1) any State of Illinois financial assistance, (2) any U.S. financial assistance, and (3) any quantifiable benefit from a U.S. Clean Coal Gasification Program received by the facility during a period equal to the shorter of (A) the life of such program or (B) the term of the agreement, such quantifiable benefit to be discounted at a rate of 14% per annum over such period.