| http://www.w3.org/ns/prov#value | - it is not their production costs and so you really do not need to be giving them this information or talking to them about it... unless you are agreeing to work for hire beforehand.All they are paying you for, is for what they are actually getting from you, at the end of the day i.e. images which they can use.So you provide them with the images, which they have asked you for, and you charge them a '
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