I want to calculate submission with using conditional logic

I am trying to limit submissions with radio button.

can we get submissions count info in form ?

when users rich the submission limit I want to give message and stop submiting form.

ex: I have 4 radio button in my form and I want to get just 15 submission for every part of form object.

is there any way to define limit for submissions.

Yes, you can use the Submission Counter widget if you want to display the number of submissions on your form.

If you are referring to a function where the products are listed together with its availability, then you can use one of these widgets:

Appointment Slots widget 
Inventory widget 
Quantity Gift Registry widget 
Gift Registry widget 

You can actually set a limit based on the number of submissions or by setting an expiration date. Here's a guide: How-to-Limit-Submissions-in-a-Form

You can also set a limit based on Unique Question. Here's a guide: How-to-set-Form-Limits-Based-on-a-Unique-Question

Also, you can prevent users from making multiple submissions by setting a Unique Submission. Here's a guide: How-to-Set-Unique-Submissions-on-a-Form

Hope that helps. Thank you.