We are a Driver service company and we would like to add a price calculator to our Joomla website. The best one would be a module so the visitors could calculate their price anytime while they're on the site.
The best would be a searchbox where you can type in your start location and under this a second searchbox where you should type in your finish point. Autocomplete is a must in that case because we have fixed start and finish points.
We operate in the capital city where we have prices for district to district service, and we also provide service outside this city. In this case we count the price from the start district to the "exit district from the city" and we add a fixed price to the finish point from the city.