Most of you subscribe to Weavezine, I'd imagine, but there is an article about costing your work here in case you were unaware.
It's a good article if you've never seen anything like this, but never works for me, the slooooo weaver. Once in a small business seminar, my group figured one of my scarves cost something like $500 for labor alone, and the same scarf, according to my then-accountant's formula, demanded $700 for the same. If I tallied the hours I work on a piece, I would be the most expensive handweaver alive, but that's my problem. And if I skimped on material, I won't be able to weave things nice enough for me to want to sell.
Sorry, didn't mean to diss the good article; this is a sticky point for me.