my mouth butts into everything like this lol - even if no one asked I would have said something like: before she cuts, how deep a hem are you putting in, 45 + 45 is 90", so how much hem, annnddd, how are you hanging them?? you need to sew the top, too. smile big here!
My bet is, the girl buying the fabric didnt know much more than the girl cutting it! If you're sewing anything, dont you sort of at the very least scribble some numbers on the back of an envalope before you runout to buy fabric?? - The last thing I would do if I were doing a real project would be ask the cutting clerk to figure out how much fabric I need for my project. sharet