Auto Fill after selecting from a drop down box

Hey Guys,

I really need some help,

I have created a spreadsheet with a drop down box,

The drop down box selections are;
- 8T
- 13T
- Tipper
- Borer
- Fuel

the next column over is price, I want to put a code in there so when it selects 8T a certain cost has come up, I have that sorted, but in in the same cell, i need to have the cost change if 13T is selected

Can someone help me out?

I have attached the spreadsheet if it helps.

Thanks