**Crina**Hi there,

I am looking to create a more complex event registration form sample which allows to add guests and also to pay the fee for them. I know this is not an option to add in Jotform directly and I do know how to add/show/hide the field to fill for a guest but what I do not know is the following:

- since there is a registration fee and I have my PayPal account set here, I am not sure in case someone will add a guest how can they choose to pay for the guest as well. I don't know how to add another payment tool (also paypal) which can be hidden depending on if they will add a guest or not, or how can I make PayPal tool to have an option of "add more to cart.." or something.

Can someone please let me know how can I make this happen?

Many thanks!

**Charlie**I am not sure if I understand the process flow you are having.

Is it something like this:

1. User opens your event registration form.

2. User will attend the event BUT needs to include a guest on the submission

3. User will pay both for himself and for the guest.

We do not have a cart feature for the payment integration, however, I think this is possible if you will be recreating the products into simple form fields. Here's a simple test form: https://form.jotform.com/53513964929972?.

Here's how I did mine:

1. First, I recreated the "Registration Fee" list as a radio button field.

2. Now I will assign calculation values on them. You can follow this guide: http://www.jotform.com/help/301-How-to-Assign-Calculation-Value

3. Now, I do not know how the guests will be incorporated in your form, in my case, I will have a number field to know how many guests will the attendee will be bringing. I then have a form collapse tool to separate each form fields of the guests. Here's a guide on how to use the form collapse tool: http://www.jotform.com/help/297-Show-or-Hide-multiple-fields-at-once-using-form-collapse-tool

4. Now I will only display the section of each guest depending on the number of guest inputted on the number field. I will use a conditional logic on this. Here's a guide to learn more about conditions: http://www.jotform.com/help/57-Smart-Forms-Using-Conditional-Logic

Below is a sample of my condition, make sure to use "Show Multiple".

5. These are all the conditions for my three guests.

6. I will then calculate the total fee using the form calculation widget.

7. This is my formula:

"Registration Fee" + ( Number of guests * 5 ) = total fee

*Note: I'm multiplying 5 because I presume each guest is charged €5.

8. Now how do we pass the calculated total fee to the payment integration? This should be possible by following this guide: http://www.jotform.com/help/275-How-to-pass-a-calculation-to-a-payment-field

You can make more complex calculations and conditions depending on your needs, but I hope this gives you an idea on how to setup yours.

Do let us know if you need more information on this.

**Crina**Hi Charlie,

I really appreciate all your help with this, it's exactly what I needed. I wasn't sure about the whole payment thing but I will give it a shot with your method! Thanks!

- JotForm Support
**Mike_G**On behalf of my colleague, Charlie, you're most welcome. Please do get back to us should you encounter any difficulties or issues with the workaround that was provided.

Thank you.