I'm in a unsure way about it too FRODO. Good idea though !
Pricing is always a hassle for me. always a different this or that, here or there.
I'm told, a standard idea is: (The cost of materials) ( +the cost of Labor, times two) is just one way to go.
And of course there are other formula's out there as well.
But, I always struggle when it comes to pulling on other people's purse strings, too hard,
I don't want to be done that way myself . So in essence I'm never sure either ! Sorry for the rant !