C. Each proposal shall be submitted on the proposal form attached, in a sealed envelope. (1) Addressed to the Purchasing Agent.All BIDS must be made on the required BID form. All blank spaces for BID prices must be filled in, in ink or typewritten, and the. The Town of Middlesex is requesting lump sum bids. Contractors shall provide the cost for the project using the Bid Forms included in this document. A complete set of samples are on file in the office of the Middlesex County Department of. Bids shall be made upon the Standard Proposal Form. Any bid guarantee required will be so specified in the bid documents for that item. This document serves as a guide to bidders of the documents that are required to be submitted with the bid.