Hi! This sounds pretty straight-forward. However, you did not specify the scope. What's the source data/format if you want a CSV produced/modified? Is it a one-time task for a fixed set of inputs, or to be repeatedly and/or independently performed (like, do you just need the result or a tool/service)? How much variance do you have in your input(s), is it all the same format or always different (I'm asking for the ratio of manual work vs. amount of setup vs. fully automated)?
With these important details left unclear, price/time are more of a guess than an estimate, until learning more about your particular requirements/scenario.