Reminds me of my middle school home ec/cooking/sewing class. We had to keep track of very project we made. For instance, if I made a skirt, I had to note how much yardage I bought, cost per yard, thread, needles and time spent on the project. My friends and I have discussed for the fun of it, to keep track of our next quilt project. I am however mindful of how much I do spent, since I have limited income. But I have LOTS of fabric, which I bought when I did work.