(a) If the offeror has established with regulated common carriers transit privileges that can be applied to the supplies when shipped from the original source, the offeror is invited to propose to use these credits for shipping the supplies to the designated Government destinations. The offeror will ship these supplies under commercial bills of lading, paying all remaining transportation charges connected with the shipment, subject to reimbursement by the Government in an amount equal to the remaining charges but not exceeding the amount quoted by the offeror.