Some stats from a family trip today.

- Transportation cost: $30 toll + $20 fuel + $20 parking
- Admission tickets: 4 * $36
- Food tickets: 4 * $14
- Total cost: $305 (including tax)
- Total number of hours elapsed: 9
- Total number of person-rides: 0 (guess who) + 4 + 5 + 6
- Average length of a ride:
~~45 seconds~~2 minutes

The question to my adoring readers: should one compute cost/benefit of the trip by:

- Average rides per hour per person? 0.42
- Dollars per ride-minute per person?
~~$27.11~~$10.17 - Amount of time each person spent
**not**on rides? 8 hours~~57~~52 minutes - Family duties satisfactorily performed? 1.0
- Other?