there are also bonus dollars at different times....like extra $50 after making 30 rides a week.
also the "surge" rates when there are more clients than drivers....could be X1.2,... X2.0...and up.
One thing not mentioned is that Uber likes new drivers and gives them all the work while longer term drivers languish in diners and empty parking lots waiting for the next call. The Uber forums are amazing fonts of info!