Probably Simple IF-Then Statement For Recipt And Inventory Correspondance

I'm a new user here and am relatively raw in excel, and today I decided to make a type of Point-Of-Sale Workbook. I'm sure it has been done, and there are probably simple templates other places, but I want to say that I've done it :P. Basically, ive created page 1 as a recipt-type page that I can print off for customers that is set to total and add-in taxes and fees and all that jazz. The page 2 is a complete inventory of my parts.

Now what I want to do is save myself a little time. I want to be able to enter an Item Number in one of the cells in page 1, and have it automatically fill in the cells for the Item and Item Cost.

So I'll probably need something like.. IF Cell b2 on Sheet1 (Item Number) = Any number from Sheet 2, C column (Item Numbers), then Cell b3 (Item) on sheet 1 = corresponding row and cell (Item) on sheet 2, and Cell b4 (Item Cost) on sheet1 = Corresponding row and cell (Item Cost). If not, then do nothing.