Writing criterions ?

[Kaine MacDog]

Yo, yo.
Nature didn't bless me with incredible drawing skills (I can hardly draw a square square) but, as many others, I try my hand at writing. For some time, now.

Yes I write furry-related texts, usually something like 30 pages long, tops. But not only ; I'll happily take on any subject, yiff included.

My friends and some people who like my work sometimes give me a subject to write on, some kind of "comissions" ; but for the first time, two guys are asking me to write for them and intend to pay me for it - so they asked me how much I want for it.

So, here's my question : Is there any furry writers who could give me advice about the criterions on wich to base my price ? Cause' I really have no ideas ^^'

Thanks