Gift Certificate with custom amount

I want to create a business gift certificate template where the buyer can input their own custom amount. I'm already integrated with FD for ecommerce.

Hello,

Could you provide some more information on how Certificate should be used? In case it is supposed to be some sort of a coupon code to be used for future submissions, I'm afraid there will not be an option for that at JotForm. It will not be possible to fetch custom amount from previous submissions. 

We will gladly check for other options if you provide us some more details on the idea.

I don't need a coupon code, etc as I will be manually tracking them (we don't get much gift certificate purchases), I just want buyers to be able to input the dollar amount they want to purchase.

Thank you.

Thank you for additional information. I assume this is your form: https://www.jotform.com/62824076310147 

If you need to allow users to enter custom amount along with predefined 'Gift Certificates' option, you can do the following:

1. Create another product option and set the price for it as '$1'.

2. Add a Quantity Selector for this product as 'Textbox'. 

Here is how this should work:

Please let us know if you need more help with this.

Great, this works. Thank you.