Change product price based on the number of registrants

I asked some questions last week, but I don't think I asked them the right way.

We have a recreation department that has multiple sports.  The registration forms can't be on one registration form due to date cut offs/number of participants.  However, we have parents with multiple children playing different sports (i.e. cheerleading and football.)  

1. How can I set up jotform to register for multiple sports/children?  

2. If there are multiple children, they receive a $5 discount for the additional child.  How can I accomplish this?

3. If they register for multiple children, can we take one payment? How?

You can create a form that collects the registration details and calculation outside your chosen payment field.

You will get the total to be computed in a Form Calculation widget. Then, from that widget to the payment field so it will be processed for payment.

Here's a Demo Form — https://form.jotform.com/201667484239059

Here are the guides you may use as a reference in creating such form.

Hide-or-Show-Multiple-Fields-at-Once

How-to-Assign-Calculation-Value

How-to-Perform-Form-Calculation-Using-a-Widget

To pass the value from the Form Calculation widget to your preferred payment field, you will have to follow the instructions in this guide.

How-to-pass-a-calculation-to-a-payment-field

Feel free to let us know if you need any further assistance.