Selected item in drop down list print code and price in different cells

I am trying to figure out a way to have a drop down list that has a description in it, when it is selected it will then print a code to one cell and a price in another cell then let the user select an other item from the drop down list if needed. If the user does select another then it will print the code into the same cell as the last code and the price to the same cell as the last price but the price cell will just show a running total.

Any ideas or any more information that you need please let me know. Thanks alot for helping out.