I invoiced a client for some small amends to a Flash site some years ago. The invoice was for £20 ($33).
Client: The invoice just says “Website updates to domain.com” Could you give me a breakdown of what you did to arrive at the price?
I try to make the point that the invoice was too small to warrant a breakdown.
Me: I’d have to list each step I took in Flash which would mean me teaching you how to use the software first.
Client: If you could do that, it would be great.