Thanks for the feedback. For simplicity there are a whole host of underlying assumptions about what a work day is, what time spent means , etc. Explaining at

Thanks for the feedback. For simplicity there are a whole host of underlying assumptions about what a work day is, what time spent means , etc. Explaining at least some of those assumptions is on my list of improvements, but there will never be a 'correct' answer in a generic form like this. It's more intended as a quick investigation/conceptual check.