Oh please my competitors are often using the same suppliers and they have the same type of beancounters we have. Especially in my industry where we have a bunch of overlap. Just recently I had a corporate partner put together a quote for something we normally buy but wanted them to buy it. They came back with a price within a few percent of what we normally pay.
There is a reason why the three letter agencies are so good at catching money laundering. They have data on what X type of business should be buying and selling at what markup.
I bet you can do it. Just start looking at your numbers.