Set the Widget "Form Calculation" to Read-Only

I am calculating tuition fees for school registration and I would like to merely show totals. I do not want the user to be able to change these.

How can I make the totals (100%..., 50%..., and Remaining...) read-only?

ALTERNATIVELY: Is there another widget I could use that simply displays calculations that I have set?

Thank you!

The read only option for the calculation field is a bit hidden.  While editing your calculation, click on the "..." button:

From there, click on "Options", then click the box for "Result field is read only":