Vendor Wholesale Cost rather then Commission


Instead of giving the Vendors commision of the products, we want to pay them the wholesale cost of the product.

e.g. Vendors will have a cost which we need to pay the Vendors when an items sells.

Vendor cost: $10

We sell for $15

Shipping: $5

There we want Vendors payment to be $10. This is not a $ or %, but moreso 2 different prices.

To me, this is much simpler then the commision payout, but I am not sure how to implement?

Any help would be much appreciated