If I purchased inventory at retail to sell at vendor events and have already received commission, shown on my 1099-Misc. How do I claim this inventory, or do I claim it?

As an independent consultant since July 2015, I have done several vendor events and purchased a good amount of product to have on hand at these events.  I pay full retail up front and receive a commission once a week, so essentially I own the product, just as if I were a customer buying it.  How do I claim these products?  If they are claimed as inventory, when I sell them at an event, will I be taxed again?