My long arm quilter has a program that prints out what the charges are - the size of my quilt; whether she or I provide the batting; the design; thread(if she provides it- sometimes I do); and the exact cost of what it will be. She has the info on her computer and prints out a copy for me, which she gives me again, marked PAID when she's done and I've paid. I think it keeps everything clear on what we both understand.