I'm curious, on what do you base your price? It seems impossible to me to realistically provide a fixed price on unknown specifications or are there any conditions (ex. max 40 hours of work)?
Of course, after I get a certain number of applications I'll have to review them and contact each individually and a lot of people are obviously going to look at what they need and whether I can deliver that in a reasonable time frame.
Short answer: (and I hate to say this) It's relative, tho I won't spend more than 33 hours on a project.