You are a braver woman than I - I'd be terrified to add up what I have spent!
However, when you're doing your accounting, don't forget to credit the value of the baby quilts, the bed and lap quilts, and the place mats. And some of your expenses may be one time costs - machine, rulers, mats, cutters, etc. Whatever I had left after those reductions, I'd count as my happiness/sanity allowance :-)