Class A-PO Optimal Principal Amount As to any Distribution Date, an amount equal to the sum of (I) the sum as to each Outstanding Mortgage Loan, of the product of (x) the PO Fraction with respect to such Mortgage Loan and (y) the sum of:
Class A Non-PO Optimal Principal Amount As to any Distribution Date, an amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of (x) the Non-PO Fraction with respect to such Mortgage Loan, and (y) the sum of:
Class P Principal Amount As of the Closing Date, $100.
Class B-4 Optimal Principal Amount As to any Distribution Date, an amount equal to the sum of (I) the sum, as to each Outstanding Mortgage Loan, of the product of (x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:
PO Principal Amount As to any Distribution Date and Loan Group, the sum of the applicable PO Percentage of (a) the principal portion of each Monthly Payment due on each Mortgage Loan in such Loan Group on the related Due Date, (b) the Stated Principal Balance, as of the date of repurchase, of each Mortgage Loan in such Loan Group that was repurchased by the Depositor pursuant to this Agreement as of such Distribution Date, (c) any Substitution Adjustment Amount in connection with any Defective Mortgage Loan in such Loan Group received with respect to such Distribution Date, (d) any Liquidation Proceeds allocable to recoveries of principal of Mortgage Loans in such Loan Group that are not yet Liquidated Mortgage Loans received during the calendar month preceding the month of such Distribution Date, (e) with respect to each Mortgage Loan in such Loan Group that became a Liquidated Mortgage Loan during the calendar month preceding the month of such Distribution Date, the amount of Liquidation Proceeds (excluding Excess Proceeds) allocable to principal received with respect to such Mortgage Loan during the calendar month preceding the month of such Distribution Date with respect to such Mortgage Loan and (f) all Principal Prepayments received on the Mortgage Loans in such Loan Group received during the calendar month preceding the month of such Distribution Date.