I received a recent commission to paint a pair of anorak chairs. My customer is purchasing unfinished chairs for me to paint a design on, and I am unsure what to charge. I know I will have to include cost of supplies, but I don’t know if I should charge an hourly rate, or a flat rate. If hourly, how do I decide what to charge? I’ve never done this before and I’m not sure how long it will take me.