XYZ Company invites your firm to submit a proposal. If you are interested in submitting a proposal, please follow the General Instructions and Requirements outlined in the enclosed Request for Proposal. Vendors will pay particular attention to all instructions, requirements, and deadlines indicated in the attached documents. Late or incomplete proposals will not be accepted. In accepting proposals, XYZ Company reserves the right to reject any and all proposals, to waive formalities and reasonable irregularities in submitted documents, and to waive any requirements in order to accept any proposal deemed to be in the best interest of XYZ Company. XYZ Company is not obligated to accept the lowest priced proposal. make a perposal to submit it.