Basically, as the title says, it is not transparent to me, as a developer, how much money is this line of code worth.
What do you do in your projects: how do you correlate the value of a specific piece of code, or task, with money ? And how do you use this correlation to prioritize tasks ?
Is there any rule of thumb, or generally used approximations ? Is there a science or methodology that studies this issue, kind of like how agile studies team productivity ?