Don't have a specific answer, however, I do have a copy of "Judy Martin's Ultimate Rotary Cutting Reference". This is a great book to have if you make quilts without patterns. She gives instructions on how to rotary cut scores of patches and also gives the yield on yardage. I refer to it often.
You can get a used copy for the price of postage:
http://www.amazon.com/Martins-Ultima...ting+reference