**Gabriele**Dear JotForm,

I want to introduce "sell products" with my form. I mean, I just want to compute the numbers and price a customer wants (payment will be held later).

Anyway, my question is this one: is it possible to select a special price if a condition hold? I mean:

Product 01: Price #1.

Product 02: Price #2.

Product 03: Price #3 OR Price #4 if both Product 01 and 02 were selected.

If it is possible, how can I do?

Thanks in advance for your help.

- JotForm Support
**Welvin**You can take advantage of the calculation condition. Here's our guide for that:

But instead of the payment integration/field, you'll have to use our basic fields like the Checkbox to configure your product items.

I've created this sample form so you have the idea of the result: https://form.jotform.com/60943289201960.

1. Product A is equal to 10

2. Product B is equal to 20

3. Product C is equal to 30

4. Selecting Product A and B is equal to 40. Note, you can repeat this combination method for the other products.

Here's the list of the conditional logic:

Let us know if you need more help with this method.