Hi Mari

Say your first entry is in C2, then in D3 enter =IF(C3="","",$C$2-C3) and
copy down as far as you want to go. You will then always subtract the last
entry from the first one, so that in D20, the formula will subtract C20 from
C2.

However, if you want the difference between the last 2 entries every time,
then enter in D3 =IF(C3="","",C2-C3) and copy down. In this case in row 20
the formula will subtract C20 from C19.

"Mari C" wrote:

Hi all - I need a formula so that I get the difference between the first
entry and the last entry - an ongoing log. How do I do that

thanks

Mari