Wholesale without setting up B2B accounts

New Member
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I'd like to have a wholesale part of my shopify that a sales guy can manage. Be able to add stores and their info, put in their order and invoice to them. I'd like for all the stores to be managed in one place by the sales guy and be able to pull reports from it. It should be connected to online store inventory so that's all in one place. 

How can I do this?