; (C) in an case in which the original loan is a loan under section 428B or a Federal Direct PLUS Loan, the rate for Federal Direct PLUS Loans for the 12-month period beginning on July 1, 2021, and ending on June 30, 2022; and (D) in a case in which the original loan is a loan under section 428C or a Federal Direct Consolidation Loan, a rate calculated in accordance with paragraph (2). (2) Interest rates for consolidation loans (A) Method of calculation To determine the interest rate for a Federal Direct Federal Consolidation Loan issued under this section, the Secretary shall— (i) determine each original loan for which the liability was discharged by the proceeds of a loan under section 428C or a Federal Direct Consolidation Loan, and calculate the proportion of the unpaid principal balance of the loan under section 428C or the Federal Direct Consolidation Loan that is applicable to each such original loan; (ii) use the proportions determined in accordance with clause (i) and the interest rate applicable for each original loan, as determined under subparagraph (B), to calculate the weighted average of the interest rates on the loans consolidated into the loan under section 428C or the Federal Direct Consolidation Loan