The rates in this calculator are round-number starting points, set in the middle of what small residential cleaning companies commonly charge in the United States. They are not a survey, not a national average, and not prices BroomDesk sets for anyone. They exist so the tool has something to compute with before you have entered your own.
The minutes behind the duration estimate are set so the implied revenue per labor hour lands close to the cost-up example further down this page. That is a deliberate choice, not a measurement. Real crews vary by a wide margin depending on team size, equipment, and how well the route is planned.
Treat every number here as a first draft you argue with. The moment you have two months of your own job times and your own payroll, the defaults have done their job and should go.