to figure the square inches of your quilt- multiply the length by the width-
that number is multiplied by how many cents per square inch being charged.
i think the (norm) is reaching about 2 cents a square inch (.02)
some people do not charge by the inch- some charge by the project itself- and there is a large list of quilters here on the board- maybe you could find one that fits in with your needs a little better.