Perhaps this has been discussed, but a search yields nothing. I'm interested in any system anyone has developed to keep your vendors honest and to ensure you're getting the best deal. My primary vendors are Sysco and Perkins (GFS) and I also have a few locals; dairy, veg, and fish monger. The little guys have small order lists so I can keep most of it straight in my head. My most used ingredients are also not an issue. It's the other hundreds of items where pricing varies greatly. Just take Helman's HD Mayo for instance, Sysco is 40% higher than Perkins. I have separate order sheets with pricing from both vendors, and I've even gotten them to provide it in excel spreadsheets, but they both claim that they cannot do that AND have the prices on it as 'the system doesn't do that". I suspect it's just because they 'd rather keep me in the dark and fear me being able to look up items on a spreadsheet that would show both of their costs, along with my last cost and who I ordered it from.
What do you all do?