The way you are doing the accounting here, it's like the supplies used in manufacturing have negative utility -- they are a cost paid, "a clear loss for the manufacturer".
Work has positive utility when it creates something of value. Considering the money paid for it as coextensive with the work is a mistake because people can work to create value without getting paid, as sometimes happens to unfortunate people. It is no more reasonable to treat the work inputs into a good as having negative utility as it is to treat the money paid for it as having negative value.
Work has positive utility when it creates something of value. Considering the money paid for it as coextensive with the work is a mistake because people can work to create value without getting paid, as sometimes happens to unfortunate people. It is no more reasonable to treat the work inputs into a good as having negative utility as it is to treat the money paid for it as having negative value.