How do i autofill a paypal amount field

I have a form called "8th grade raffle fundraiser" which calculates a cost of tickets chosen.

I want that calculation to go into the paypal amount field..... but its not doing it.  and where it says get amount, it says MANUAL and won't let me change it.... what am I doing wrong?

The preview for that form is here:

https://form.jotform.com/70325215063950

According to your details above you seem to be having some problems with getting your paypal payment field to properly get a calculated amount to charge buyers of the raffle fundraiser.

Upon inspection of this problem I found the screenshot you have seems quite a bit different though it essentially the same thing.

When I tested this I am seeing the cost pulled into the paypal field from your calculation on my end.

Were you able to get this working or are you still having trouble with it?

If you are still having any trouble with it then I would highly recommend referring to the following guides below which should help you alot more with doing so:

https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field