Calculator not an option under properties

Hi,

I am trying to use Acrobat Pro DC to build a form. The form is made and ready, but I thought it would be nice to have the total automatically calculate instead of having the user do it themselves. I watched and read several tutorials and it all looks simple, but I can't find the calculator under properties.

This is the version I work with.

When I right click and open my properties panel, this is all I see:

I can't find the calculation option. Does my version not allow for calculations?

The calculation is just a simple addition where all the values added to the # of Miles column populates in the Total Miles box.

Any insight would be appreciated.