Wordpress Plugin - Fare Calculator

Looking at a WP plugin for a fare calculator. My client has a chauffeur hire car business and he would like a plugin where a person could put in their start destination and the finish destination and this would provide how far the trip would be and how much it would cost. This is for Australia and mostly around the Sydney area (in case that makes a difference). I would like anyone that says that they can do the job to provide examples of the work that they have done before. So that would mean a website that is using the same type of calculator that I have asked for. You MUST have some ratings on freelancer. I am thinking that someone has a plugin that they have developed already and would not have to build it from scratch. Would also need it be be configurable so that when prices change, that I could do that myself. The calculator would need to be able to work out how far and the fare. Example - 0 to 15 kmls would cost $45. 16 to 35 klms would cost $60, etc, etc. These are just examples of the types of calcs that would need to be done and if the client decides to change the cost or the distances that are calculated, then again I would need to be able to do the editing myself. Please take note of the budget. Thanks and good luck