Enter the address from which you want to route in the input box mark address. Change the other variables (diesel price, fuel efficiency, etc.) to your needs or keep them at the default. The "check bridges" checkbox will route around locations of closed bridges as posted on an ODOT webmap. After your parameters are what you want, click on an soy elevator (one of the orange dots) to begin. An infobox will popup with a profit estimation and some data about the elevator. Hover the mouse over the route created to see directions displayed in the box on the left hand side.
There are many more improvements that I would like to add in the future. For the fuel prices, the application should be able to change the default price by using the input location to find out what the fuel prices are at the nearest fueling stations, and suggest those fueling locations to the end user. The ability for an end user to save a common address and elevator query through cookies or logins is something that I'm far off from figuring out how to implement, but is probably the most desired feature to add. If I can get DTN data updated every day instead of one day's price data like used currently, I should be able to show how the price history of each elevator and whether its possibly better for a farmer to wait to sell based on past trends.