I think I found some errors.
3 hours are 180 minutes and so an exalted with body mending etc. needs 18 Minutes not 13.
2 days are 48 hours or 2880 minutes, wich means 288 minutes or 4 hours and 48 Minutes instead of 4h 28min.
And at least (not really imortant) One tenth of a week is 16h...