Help !! I am trying to add a scanned doc to file in excel

[aprisl280zx]

I am making a spreadsheet that I need to make an invoice that will be scanned in appear in the same manner a comment would be seen PLEASE HELP! for example I will have amount in different areas that will have an invoice back up I would like to be able to reference the invoice copy as proof of bill opposed to digging thru 20 inches of paper to see backup as well as having to send documents around the world