Making Money

I’m sure production overhead is way more costly than airfare.
Are you sure HSN pays airfare for vendors?

If you mean by sales reps the vendors representing a product line or people like Sam, Marla, Antthony, etc., only guessing, but I would doubt HSN pays for these airfares, it’s an expense of doing business with HSN since they aren’t employees of HSN.
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From what I understand vendors pay for their own airfare but in the long run we will because it will be added into the cost of the product. It is the way all vendors live by.