lookup value from different workbook

[Guest]

I need to lookup a value from another workbook. I need it to be the last
alpha-numeric value entered in a column. The only thing is that I need it to
pull the value from 3 different sheets with in a work book depending on the
value entered in a cell in sheet 1. Here is an example to help you understand.

Book 1

C2 needs to be the value pulled from the other workbook.

J7 has a posibility of being either silo 1, silo 2, or silo 3.

If J7 equals "silo 1" I need it to pull the last alpha numeric from the
sheet labeled "silo 1" in "book 2"

Help me if you can.

 

[Guest]

So in C2 you need nested if then else formulas referencing the value in J7 to
determine where to get the external data from. Interms of getting that data
take a look at this link to get the last value...

http://www.xldynamic.com/source/xld.LastValue.html