I think it's something along the lines of $15 to breathe Minnie Van air, then the per mile is somewhere between an arm and a leg depending on the number of people willing to sacrifice aforementioned limbs.
[Cynical filter translation: $15 base fare. $2.75 - $3.00 per mile based on demand]
Whatever it is, you can bet it works out to costing more money than it was before based on data of existing travel habits. The Mouse doesn't make changes to save us money.