How to add a hidden value to a dropdown?

This question has been asked before but didn't provide the correct awnser so I had to ask it again. I'm building a form to calculate a price (just calculation no payments). I wanted to add a dropdown menu to select what kind of package they want. Example: basic is $10 and pro is $50. But if I'm making a form like that I have to add the value to the options and it will look like this:

Select your package
o Basic 10
o Pro 50

The prices should now be visible. It should look like this

Select your package
o Basic
o Pro

So how can I add a value to a dropdown or radiobox for a calculation without displaying it?

Hi rintle,

Unfortunately, this is almost impossible. However, you can use radio buttons for your task.

If you need any further assistance, please let us know.

Have a good time.

Too bad. Isn't it possible in any way, maybe hide the text in the code by making the number part white (same as bg) or to set display to hidden?

Hi,

This is not related to JotForm, capability of styling dropdown menu values in CSS is too limited.

If there is another topic that I can help you, please let me.

I see. Thank you for your insane fast help.
Have a good one.

hi,

You actually can add a customer calculation value to a dropdown without displaying it.  Click on the field you wish to change the calculation value of and then click on the little gear to open up the settings.  From there you can assign a value to each option in the dropdown:

These will not be shown in the form but you can use them to pass values to a custom calculation field:

http://www.jotform.com/blog/97-Introducing-Field-Calculations-for-Forms

Please let us know if you have any further questions and we will be happy to help.

Thank you for using JotForm!