Thanks for the comment @georgeboya!
One of the "pricing methods" I often recommend to artists (and crafts people) is to determine what you want your "day rate" to be. Forget about "hours" because they can easily be used for this and that, and lunch and a friend coming by. Your day rate is partly determined by what is the body of work you create in what you consider a full day. If you say "My day rate is 200 Euro" and you can make 3 items, then they must have a lowest price of 67 Euro each. If you can make 10, then lowest price would be 20 Euro each, and so on... that's a good starting point. If that is difficult to to (with some art, like ceramics and painting, it can be) multiply by 7 and see what you make in a week.
that's a good rule @redddragonfly :) i can see the logic but because of my artwork its part researching and part collaging i cannot really determine my day rate ( 2 hours one day 5 another etc). i II try to think about your suggestion:) thank you very much.