Just to add my two cents as a LA quilter. Flat fee verses square inch fee- Not all quilts are created equal. I have quilted some quilts that the customer has called a double and it measured more in the king category. So if I charged according to "a double", I would lose money and time spent on the quilt. The square inch method of charging seems fairer to me cause no matter what size the customer thinks it is, I have a reasonable return for my labor and time. Like someone else said, I don't nickel and dime my customers to death. The end cost may reflect a small increase to the square inch figure for seaming backs and etc. My prices start at .0125 per inch for meandering and upward from there depending what the customer wants. Does this help?