Hello,
I am trying to write a formula that first looksup a number and then runs a
calculation from that number. Here is a look at what I have so far:

First Part:
=IF(ISNA(VLOOKUP($A5,'907100'!$G:$K,5,FALSE)),"",( VLOOKUP($A5,'907100'!$G:$K,5,FALSE)))

Second Part: IF(ISERROR(B5/T$2),"",(B5/T$2))

B5 is where I am writing the formula... I am not sure how to combine them
into one formula.

Thank you,