JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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Thank you for contacting us.
First, I highly recommend creating an account (for FREE!). You can use this URL link http://www.joform.com/signup to signup using your email.
As to your inquiry..
You may want to check on existing Order Form templates at the Form Gallery (link: http://www.jotform.com/form-templates/category/order-form)
Check this Cake Order template form
You can add your Payment account and it should be all set
user guide: Setting-Up-Your-First-Order-Form
Hope this help. Let us know if you need further assistance.