Acrobat User Community Forums

I am creating a very basic, editable form in Acrobat for a client on an existing PDF that they sent to me. For one section of the form, I have created a check box... and what I want it to do... is when the checkbox is "checked," a value of $50 is automatically populated in a separate field. This way, when they indicate by checking the box, that they are going to attend this event, the amount is automatically entered into the next field.