For both of you: there's a Taxi Fare Estimator link in the Popular Transportation Links 'sticky' thread at the top of this forum.
Now, this is just me, and I realize cab drivers are in business to make money but - out of consideration for the cab driver AND the subsequent passengers, maybe taking a cab while wearing a wet swimsuit isn't the best idea?
Truly, though - you won't be going directly from the wave pool or lazy river, into the cab. Most likely, given the Orlando temperatures, the properties of spandex (no, not that one - the one that allows the material to dry much more quickly than, say, a cotton knit) and the absorbancy of terrycloth - you probably won't even be damp by the time you exit the park, much less wet. And you can always bring a change of clothes.