How can I connect an order form to my paypal account?

You have to set it up in the form. Here's our guide to integrate: https://www.jotform.com/help/50-PayPal-Forms. 

Your form is using the checkbox field. If you'd like to calculate these options in the form, simply follow the following steps:

1. Add a calculation value for the checkbox options: https://www.jotform.com/help/301-How-to-Assign-Calculation-Value.

2. Get the total by calculation widget: https://www.jotform.com/help/259-How-to-perform-calculation-in-the-form.

3. Pass the Total to the Paypal field: https://www.jotform.com/help/275-How-to-pass-a-calculation-to-a-payment-field.

Let us know if you need further assistance.