stakeholders, including Medicaid managed care plans, health care providers, and Medicaid beneficiary advocates, and include in such application a description of such consultation. (5) Payment (A) In general For each quarter occurring during the period for which the demonstration project is conducted (after the first 18 months of such period), the Secretary shall pay under this subsection, subject to subparagraph (C), to each State selected under paragraph (4) an amount equal to 80 percent of so much of the qualified sums expended during such quarter. (B) Qualified sums defined For purposes of subparagraph (A), the term qualified sums means, with respect to a State and a quarter, the amount equal to the amount (if any) by which the sums expended by the State during such quarter attributable to substance use treatment or recovery services furnished by providers participating under the State plan (or a waiver of such plan) exceeds 1/4 of such sums expended by the State during fiscal year 2018 attributable to substance use treatment or recovery services. (C) Non-duplication of payment In the case that payment is made under subparagraph (A) with respect to expenditures for substance use treatment or recovery services furnished by providers participating under the State plan (or a waiver of such plan), payment may not also be made under subsection (a) with respect to expenditures for the same services so furnished. (6) Reports (A) State reports A State receiving payments under paragraph (5) shall, for the period of the demonstration project under this subsection, submit to the Secretary a quarterly report, with respect to expenditures for substance use treatment or recovery services for which payment is made to the State under this subsection, on the following: (i) The specific activities with respect to which payment under this subsection was provided. (ii) The number of providers that delivered substance use disorder treatment or recovery services in the State under the demonstration project compared to the