I want to subtract the 2 columns

Table Name: Cash Balance

Column1: Total Money In
Column 2: Total Money Out
Column 3: Total

I already have a formula for Column 1 and 2. But I dont know what expression can i use for Column 3 to subtract Column 1 and 2

Expressions Unknown

=[Total Money In] - [Total Money Out]

I dont know what was the problem

What is the output to your expression in the expression editor? Does it flag an error when you put in the above formula into “Column 3”? If so, what is the error given?

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Thank You for replying my post. I already fix it.

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how did you solve it