User Defined Discount/Payment

When I use the User Defined Product field, users are not allowed to submit negative amounts.

I can use Calculation to have the online form show accurate totals based on user’s current payment or credit applied - but the “Order” shown on notifications does not reflect the credits or payments as discounts to the total. This “Order” that is automatically formatted is not necessary for the user.

Can I remove the ORDER from the notifications (or hide it)? Or, can I manipulate a Pricing Field to allow users to indicate payments they want to make upon submission of the form (leaving a balance due)?

You can remove the product fields from the notification using this filter:

Will that work for you or do you need something else?