You may want to reach out to mentors listed here: https://docs.google.com/document/d/1gimXR5nAXx90K9cvYFkHB6qPvWO7NlWTHz9SbFDcX1g/edit#heading=h.re5hoxm4b3rp.
Set it high enough such that you can do these 10-20% discounts after you give a 50% discount off the list price