Conditional logic to insert value of 10 on text box?

What to do:

If 47. Amount paid by MSC $ is empty,

then 46, $10.00 of the registration fee should show up in the box and be included in the total calculation. I can take care of the total calculation. I just need help put the $10.00 in the box.

Thanks.

You can add a new condition that should insert a value of 10 in the "Registration Fee" box when the "Amount Paid by MSC $" is empty. Here's how:

Here's how you can perform calculations on your forms, either using the form calculation widget or by using the conditions:

https://www.jotform.com/help/259-How-to-Perform-Calculation-in-the-Form 

https://www.jotform.com/help/268-How-to-Insert-Text-or-Mathematical-Calculation-into-a-Field-Using-Conditional-Logic 

Let us know if that helps.