need help on a fomula

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there is a way to calculate a cell substract the whole column above?

3 Replies
If the cell you are looking at is A55 then something like: =A55-SUM(A$1:A54)

thanks! but I didn't specify my problem well I want in cell N6 a formula something like this: =m6-(the last entry in this column [in this case it's in m3])*L6 [in this case it should come out337.5]

‏‏צילום מסך (13).png


assuming you have excel 365: