You can choose semen straws from several bulls. The shipping charge of approximately $100-$125 (actual cost to your zip code) is a one time charge to ship all the straws you order. If you order 1 straw or 20 straws, the shipping is still approximately $100-$125. You will have to pay for the semen by credit card, Paypal or by mailing us a check. Once we receive payment for the semen straws, we will contact you with the phone number of the bull stud where the semen is housed. You will pay the exact shipping charge directly to the bull stud.