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?