How to charge depending on Member ID

I have a client with 1500 members with different levels (gold, premium), we are making the registration form for an event and they want to charge different amount depeding on the level of the member.... and if they are not members, become one, paying another amount... can this be achieved somehow with jotform?

You can use any of the payment fields e.g. Paypal and define the level of membership as products.

Here's how to integrate JotForm with Paypal: https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal

Example, you can create a separate product for the premium and gold level. Then define different amount on each of them. So on the user's side, they can simply select the product they want and pay the amount on Paypal.

Alternatively, you can also use the regular checkbox or radio button fields as the membership choices. Then calculate the total by following this guide. Then pass the total amount into the payment field http://www.jotform.com/help/275-How-to-pass-a-calculation-to-a-payment-field.

If you need further help, let us know.