It saves me three hours of commuting, plus an hour of dressing up and down, so that's a +50% time burden, meaning I should add or subtract at least 10% per day.

It saves me three hours of commuting, plus an hour of dressing up and down, so that's a +50% time burden, meaning I should add or subtract at least 10% per day. To make it worse, I don't get to nap during my lunch hour, and I have to subject myself to high office CO2, contagiously sick coworkers, and significant pollution while commuting. All this makes me twice as exhausted, so adding or subtracting 20% feels justified.