Can you or how can you have to lookups?

I have a spreadsheet that has a column with store #'s and a column with part
#'s and a column with Qty's.

I want to compare it to another workbook. See if that spreadsheet is the
same in quantities and part #'s. for that store.

I basically have a file of PO's for store orders which include part#'s and
quatities for stores.

I sent it to the be ordered and we've received the orders and now I want to
see if they there are any orders missing for each store and part # and
compare the qty's as well.

Hope that wasn't confusing.

If you find this store and this part # on this workbook give me the qty.

Thanks B.