How to have a cell display nothing if formatting is in it

[FrankE67]

Hi all. been messing with this for a few days now and can't seem to get it right.
So the situation is i have a worksheet that has the following in it already:
C8, D8, and E8 have =c6+c7, =d6+d7, and =e6+e7, etc. This goes on in C14, D14 and E14.
C10, D10, and E10 have =c8-c9, d8-d9, and e8-e9.
E9 is always 1, all other fields are per input.
My issue is I want E10 to be blank if there is no input in E8. But with the formulas it always bring a -1. how can i do this so E10, E16, etc remain blank if there is no input in the other fields(E8)?
AB C D E

 

[FrankE67]

Kevin9999, thanks that works. i knew it was going to be something simple. i was just just over thinking it. i skipped that because i thought it would put a zero in there, which i didn't want either, but i just tried it and it leaves the field blank. PERFECT

 

[kevin9999]

Happy to help, and thanks for the feedback