Help matching rows and replacing numbers associated with them

Hey,

I'm looking for help on an excel worksheet I am working on. I'm good with computers but never really learned excel, so sorry if this is just a stupid question...

I have 4 Columns. Column A has a master list of inventory numbers(about 3000 of them). Column B has dollar figures associated with them. Column C has some inventory numbers in it(800 of them), all of which are also in the master list in Column A. Column D has dollar figures that are associated with the inventory numbers in Column C.

My question is how can I make it so that if an inventory number in Column C equals one in Column A that the dollar figure associated with the inventory number in Column C gets put into its own column on the same row as the inventory number it was equal to in Column A.

I've tried basic IF functions and I can't get it to work because the inventory numbers aren't lined up on the same row. So one may be on row 300 but the other maybe located in row 12. Maybe if a double sort was possible or if someone knows how to make the row in the IF statement a variable.

Anyways, any help would be greatly appreciated. And again, sorry if that was confusing or just a plain stupid question.

Thanks!
Andrew