Any design or timed labour is based on average work time. These prices may vary but should be close to these prices. To keep design prices low, have good artwork, know what you want, and get it to us in the easiest way for us to work with.
Things that add costs: Send multiple attachments and multiple emails, change your mind and require many proofs, change your artwork or photo mid stream or just being ultra picky... That being said we have no problem doing it.