Value based upon the sum of the gross sales prices of all units (subject to discounts on rent restricted units) plus the aggregate UPBUPBUnpaid Principal Balance of all existing Mortgage LoansMortgage LoansMortgage debt obligation evidenced, or when made will be evidenced, by the Loan Documents, or  a mortgage debt obligation with a Fannie Mae credit enhancement. (prior to any proposed refinancing) secured by a LienLienLien, mortgage, bond interest, pledge, security interest, charge, or encumbrance of any kind. on the Cooperative PropertyCooperative PropertyMultifamily residential property owned by a Cooperative Organization. .