Limit Drop Down List And Linking To Other Info

I have set up a spreadsheet that requires info to be inputted into cells. I have created drop down lists in the cells to only allow certain information to be inputted.

Allow user to use a drop down list and pick the appropriate entry, then have another drop down list in the adjacent cell that only contains items that correspond to what the first drop down entry was (i.e. company name in first drop down box, adjacent cell drop down list only contains parts made for that company). Then I would like the next column to contain the pricing of the item that was chosen in the previous cell's drop down box. Ideally, this cell would be populated automatically depending on the part chosen for the company. I am trying to create a log of parts shipped and total amount shipped.