Compare vendor proposals the way a procurement lead does by normalizing everything to the same units, pricing the full term rather than just the first invoice, and reading the terms the sales deck skipped. The skill takes a folder of quotes, proposals, and SOWs along with a purchase objective, then extracts key terms, converts pricing to a common basis, computes a realistic three-year total cost of ownership, and outputs a side-by-side comparison matrix. Reach for it when you need to rigorously evaluate multiple vendor bids and arm yourself with concrete negotiation leverage points and reference-check questions.