How to make a cell invisiable without deleting the formula.

I'm trying to have a cell become invisible if it is equal to zero. But I don't want to have the formula erased in that cell. How can I do this? I've attached an example of what I want to do. "Day1" is where I want to enter the numbers. "1" is where I want the zeros to become invisible. And, "Diesel" is where I want the totals to show. If you can help me, thanks.

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