That's fairly simple. The 1/3 @ $30
Assume 99 carparks (arbitrary)
99 x 8 = $792
33 x 30 = $990
It also encourages people to take public transport. Which I assume is part of it.
That works.
I always made that assumption as well.
Just on the arithmetic, does anyone know what the car park capacity actually is?
...and I no longer have the mental capacity to work that out (Tegal's example) ... I despair.