I agree with the calculation of how to figure out price, but wanted to add that the figure you come up with is the wholesale price. At a store with employees, inventory, other bills to pay, etc., (even an online store with employees) they would double it. So I wouldn't give any "discount," per se. I'd just say I was selling the bows at the wholesale price, and that should make them happy! If you sold the same bow to a store, the customer would pay up to twice what you're charging.