Thank you for your interest in doing business with the City of San Diego! Photo Collage of Bids and Contracts.Learn how the County buys products and services. Search contracts, find open solicitations on BuyNet. RESPONSE FILE: Proposers will only be able to upload one (1) document in the "Response File" section of PlanetBids. 1. Proposal Form: Complete, sign and submit form. 2. The Vendor shall complete and submit all forms as provided in the RFP, including: Signature page, Contact Information,.