Thank you everyone for your responses. I do feel as if I did the right thing with my response to her. Many of you agreed with me, others would not have bought that pattern and figured it out for themselves. For me, I'm typically a "sewer" who has several charm packs and jelly rolls. I wanted the correct measurements so that a special fabric could be used and additional fabric would not have to be purchased. The $8.50 for the pattern gave me that piece of mind.
Thanks again.