How to remove an initial value (0) from a "Numeric Entry" field

I'm having the same issues and I've tried all of the above. The javascript doesn't appear to work for me, it gives the NaN message.

The strangest thing is slide 1 shows the "0" and slide 2 which has the same numeric entry type shows blank. I've been having a hard time trying to figure out what happened and why they are different on each slide.

Any insights?