offered in the large group market for any plan year is an amount equal to the total costs (other than administrative costs) of such plan or the issuer of such coverage in covering items and services furnished during such plan year under such plan or such coverage. (B) Certain reductions Allowable costs of a self-insured group health plan or health insurance coverage offered in the large group market for a plan year shall be reduced by any— (i) reinsurance payments received by such plan or coverage pursuant to a waiver approved under section 1332 of such Act ( 42 U.S.C. 18052 ) for such plan year