I actually would question if price information would need to be visible on a inventory counting sheet for people who might not even have a user id in SAP or will be restricted from displaying price information. I would ask a compliance officer before spending time in programming. Material cost is a sensitive information. And from a process point of view it is also doubtful what this info does to a physical count, do the people count with a higher accuracy if the price is high and just relax if the price is low?
Anyhow, you are actually asking for tables, even pretty complicated. Since it is very easy to find these information with a little research and for the fact that asking for price table and serial number table has been done frequently before, I am giving you a general information that shall help you to find this info in yourself and lock this thread: First aid for Newbies in MM