Either by intermediate, non-Iranian 3rd party, engaged by and for the account of Buyer a) Irrevocable L/C; orb) 100% Net cash with order, or, subject to performance within time constraints of Buyer;c) ) 50% Advance Payment cash with order against APG, followed by 50% net cash upon receipt of faxed copies of shipping documents or d) ) Alternative workable terms to be mutually agreed