This advice probably comes in a little late, but keep it in mind for the next. I speak to my customers before hand. If they don't know the process I explain some of what it takes, how much thread, batting, fabrics, needles, and with those jeans one you tend to break several of them, I sometimes even make them buy the fabrics themself. By the time I start the quilt they know how much I will charge and sometimes require a deposit, so they do come back to pick it up, there are no surprises (I hate surprises) and no misunderstanding. Unless the quilt is a gift, make sure you are both comfortable with the fee ahead of time, for the sake of the friendship.
But your quilt is done and now you need to charge. Think for a while, how much woould you pay someone to make it for you, and take it from there. Look on line or at local shops to see what other are charging to give you an idea.
Maria