How to add and subtract columns of an imported file while taking a cumulative sum

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Josh Culpepper
Josh Culpepper 2018-4-24
Hello,
I'm trying to add one column to a zero column and subtract another column while running a cumulative sum. Additionally, I want any negative value to be set to zero.
Here's what I did in excel: =max(L2+J3-I3,0) So value L3=L2+J3-I3. If that number is negative, then I want the output to be zero. That function carries through the entire column.
I'm pretty lost so any help is greatly appreciated.

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