Showing field value only if checkbox is selected

[MAK777]

I have a checkbox in one column and a text field in another column.

I want to show field value in the 2nd column only if the checkbox is selected in the first column, otherwise I want to keep the field blank.

How to do this?

The value I want to show is $15.00 and it will be added to the sum with other fields calculation in the Total field. 

[try67 · Accepted solution]

As the custom calculation script of the text field use something like this:

event.value = this.getField("Checkbox1").valueAsString=="Off" ? "" : 15;

[MAK777]

Thank you for the quick help.