An example I came across: 200 - 30 Minutes, 450 - 1 Hour, 650 - 1.5 Hour, 800 - 2 Hour, 1200 - 3 Hour
Looking at it in half hour increments:
1st half hour: 200
2nd half hour: 250
3rd half hour: 200
In hour increments:
1st hour: 450
2nd hour: 350
3rd hour: 400
So as half hours go, the price goes up, then back down, but as hours go it goes down, then back up. It doesn't have to make sense to me, but does it make sense to anyone?