Excel 2007 : How to Return a Blank instead of a 0

[MLanning33]

I have an excel question.
In the attached file, I have a formula to return the abs value of H8-G8.
I would like to not see the 0 when there is no data in H8 or G8.

Then I have a formula in K7 that I believe I have set up correctly?
I want it to show the Green check mark when the value of I7 is < 0.135,
and a Red X when the value of I7 is > 0.135, but I want it to show nothing
when there is not a value in cell I7.

Please help!

[arthurbr]

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