My BIL arranges conferences for a living. This is the norm.
I work for a company that hold hundreds of seminars and dozens of high end multi-day conferences (filled by SEC accountants and lawyers).
They might spend days negotiating the prices, but when the final bills arrive, it can have almost any breakdown as long as the items are in their major accounting areas. Muffins and steaks are the same here.
We don't care how the vendor allocates the bill, as long as it isn't over the negotiated amount. And we sure don't want to see hundreds of line items for a few dollars apiece.