Marlett Checkboxes

I need help modifying the following code:

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So that the checkbox is added only if the data in column C is blank or "0" (contains formulas). Perhaps the Range selection/naming can be modified given that I have a table in $B$2:$F$100.

Thanks

Awesome, that is exactly what I needed. I had tried inserting many different And conditions in the If statement but was lacking the Offset in order for it to work!