I agree it's low, but it is a "relative". . Set a price per square inch - and let her know what a good discount she is getting. My quilter sews on the binding, but I hand sew it to the front. Sometimes I buy the batting, sometimes she uses hers from a big roll. Many of mine are quilted with an all over meandering design which she says is easy. A few are more intricately quilted and the price reflects that. Maybe you could make up printed cards with your prices and hand her a few with the quilts.